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Finding the Fourth Proportional to 354,069.28, 531,349.14 and 140,815.30

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Solution

The fourth proportional to 354,069.28, 531,349.14 and 140,815.30 is: 211,320.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,069.28 : 531,349.14 = 140,815.30 : x
  2. Step 2: Convert to fraction form
    354,069.28/531,349.14 = 140,815.30/x
  3. Step 3: Cross multiply
    354,069.28x = 531,349.14 × 140,815.30
  4. Step 4: Simplify right side
    354,069.28x = 74,822,088,553.84
  5. Step 5: Solve for x
    x = 74,822,088,553.84/354,069.28
  6. Step 6: Final answer
    x = 211,320.48

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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.