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Finding the Fourth Proportional to 680,030.40, 938,404.87 and 374,057.40

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Solution

The fourth proportional to 680,030.40, 938,404.87 and 374,057.40 is: 516,178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,030.40 : 938,404.87 = 374,057.40 : x
  2. Step 2: Convert to fraction form
    680,030.40/938,404.87 = 374,057.40/x
  3. Step 3: Cross multiply
    680,030.40x = 938,404.87 × 374,057.40
  4. Step 4: Simplify right side
    680,030.40x = 351,017,285,819.54
  5. Step 5: Solve for x
    x = 351,017,285,819.54/680,030.40
  6. Step 6: Final answer
    x = 516,178.81

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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.