Home / 780,030-1,170,045-189,054

Finding the Fourth Proportional to 780,030, 1,170,045 and 189,054

Calculator

Solution

The fourth proportional to 780,030, 1,170,045 and 189,054 is: 283,581

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,030 : 1,170,045 = 189,054 : x
  2. Step 2: Convert to fraction form
    780,030/1,170,045 = 189,054/x
  3. Step 3: Cross multiply
    780,030x = 1,170,045 × 189,054
  4. Step 4: Simplify right side
    780,030x = 221,201,687,430
  5. Step 5: Solve for x
    x = 221,201,687,430/780,030
  6. Step 6: Final answer
    x = 283,581

Related Problems

Find fourth proportional to 390,015, 585,022.50 and 94,527
Half scale
Find fourth proportional to 1,560,060, 2,340,090 and 378,108
Double scale
Find fourth proportional to 780,031, 1,170,046.50 and 189,055
Similar ratio
Find fourth proportional to 1,170,045, 1,755,067.50 and 283,581
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.