Home / 780,186-1,076,656.68-422,490

Finding the Fourth Proportional to 780,186, 1,076,656.68 and 422,490

Calculator

Solution

The fourth proportional to 780,186, 1,076,656.68 and 422,490 is: 583,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,186 : 1,076,656.68 = 422,490 : x
  2. Step 2: Convert to fraction form
    780,186/1,076,656.68 = 422,490/x
  3. Step 3: Cross multiply
    780,186x = 1,076,656.68 × 422,490
  4. Step 4: Simplify right side
    780,186x = 454,876,680,733.20
  5. Step 5: Solve for x
    x = 454,876,680,733.20/780,186
  6. Step 6: Final answer
    x = 583,036.20

Related Problems

Find fourth proportional to 390,093, 538,328.34 and 211,245
Half scale
Find fourth proportional to 1,560,372, 2,153,313.36 and 844,980
Double scale
Find fourth proportional to 780,187, 1,076,658.06 and 422,491
Similar ratio
Find fourth proportional to 1,170,279, 1,614,985.02 and 633,735
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.