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Finding the Fourth Proportional to 680,070.20, 938,496.88 and 374,140.04

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Solution

The fourth proportional to 680,070.20, 938,496.88 and 374,140.04 is: 516,313.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,070.20 : 938,496.88 = 374,140.04 : x
  2. Step 2: Convert to fraction form
    680,070.20/938,496.88 = 374,140.04/x
  3. Step 3: Cross multiply
    680,070.20x = 938,496.88 × 374,140.04
  4. Step 4: Simplify right side
    680,070.20x = 351,129,258,812.18
  5. Step 5: Solve for x
    x = 351,129,258,812.18/680,070.20
  6. Step 6: Final answer
    x = 516,313.25

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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.