Home / 978,306.75-1,349,380.35-945,387

Finding the Fourth Proportional to 978,306.75, 1,349,380.35 and 945,387

Calculator

Solution

The fourth proportional to 978,306.75, 1,349,380.35 and 945,387 is: 1,303,974.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,306.75 : 1,349,380.35 = 945,387 : x
  2. Step 2: Convert to fraction form
    978,306.75/1,349,380.35 = 945,387/x
  3. Step 3: Cross multiply
    978,306.75x = 1,349,380.35 × 945,387
  4. Step 4: Simplify right side
    978,306.75x = 1,275,686,640,945.45
  5. Step 5: Solve for x
    x = 1,275,686,640,945.45/978,306.75
  6. Step 6: Final answer
    x = 1,303,974.08

Related Problems

Find fourth proportional to 489,153.38, 674,690.18 and 472,693.50
Half scale
Find fourth proportional to 1,956,613.50, 2,698,760.70 and 1,890,774
Double scale
Find fourth proportional to 978,307.75, 1,349,381.73 and 945,388
Similar ratio
Find fourth proportional to 1,467,460.13, 2,024,070.53 and 1,418,080.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.