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Finding the Fourth Proportional to 388,750.96, 581,809.80 and 239,086.20

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Solution

The fourth proportional to 388,750.96, 581,809.80 and 239,086.20 is: 357,819.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,750.96 : 581,809.80 = 239,086.20 : x
  2. Step 2: Convert to fraction form
    388,750.96/581,809.80 = 239,086.20/x
  3. Step 3: Cross multiply
    388,750.96x = 581,809.80 × 239,086.20
  4. Step 4: Simplify right side
    388,750.96x = 139,102,694,204.76
  5. Step 5: Solve for x
    x = 139,102,694,204.76/388,750.96
  6. Step 6: Final answer
    x = 357,819.55

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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.