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Finding the Fourth Proportional to 680,289.80, 938,776.40 and 374,337.58

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Solution

The fourth proportional to 680,289.80, 938,776.40 and 374,337.58 is: 516,572.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,289.80 : 938,776.40 = 374,337.58 : x
  2. Step 2: Convert to fraction form
    680,289.80/938,776.40 = 374,337.58/x
  3. Step 3: Cross multiply
    680,289.80x = 938,776.40 × 374,337.58
  4. Step 4: Simplify right side
    680,289.80x = 351,419,285,737.11
  5. Step 5: Solve for x
    x = 351,419,285,737.11/680,289.80
  6. Step 6: Final answer
    x = 516,572.92

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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.