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Finding the Fourth Proportional to 615,901.80, 923,453.10 and 260,819.40

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Solution

The fourth proportional to 615,901.80, 923,453.10 and 260,819.40 is: 391,059.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,901.80 : 923,453.10 = 260,819.40 : x
  2. Step 2: Convert to fraction form
    615,901.80/923,453.10 = 260,819.40/x
  3. Step 3: Cross multiply
    615,901.80x = 923,453.10 × 260,819.40
  4. Step 4: Simplify right side
    615,901.80x = 240,854,483,470.14
  5. Step 5: Solve for x
    x = 240,854,483,470.14/615,901.80
  6. Step 6: Final answer
    x = 391,059.88

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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.