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Finding the Fourth Proportional to 347,299.20, 521,006.40 and 147,715.20

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Solution

The fourth proportional to 347,299.20, 521,006.40 and 147,715.20 is: 221,597.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,299.20 : 521,006.40 = 147,715.20 : x
  2. Step 2: Convert to fraction form
    347,299.20/521,006.40 = 147,715.20/x
  3. Step 3: Cross multiply
    347,299.20x = 521,006.40 × 147,715.20
  4. Step 4: Simplify right side
    347,299.20x = 76,960,564,577.28
  5. Step 5: Solve for x
    x = 76,960,564,577.28/347,299.20
  6. Step 6: Final answer
    x = 221,597.30

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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.