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Finding the Fourth Proportional to 578,737.10, 868,105.65 and 389,780.30

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Solution

The fourth proportional to 578,737.10, 868,105.65 and 389,780.30 is: 584,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,737.10 : 868,105.65 = 389,780.30 : x
  2. Step 2: Convert to fraction form
    578,737.10/868,105.65 = 389,780.30/x
  3. Step 3: Cross multiply
    578,737.10x = 868,105.65 × 389,780.30
  4. Step 4: Simplify right side
    578,737.10x = 338,370,480,688.70
  5. Step 5: Solve for x
    x = 338,370,480,688.70/578,737.10
  6. Step 6: Final answer
    x = 584,670.45

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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.