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Finding the Fourth Proportional to 347,978.40, 521,663.85 and 134,891.70

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Solution

The fourth proportional to 347,978.40, 521,663.85 and 134,891.70 is: 202,219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,978.40 : 521,663.85 = 134,891.70 : x
  2. Step 2: Convert to fraction form
    347,978.40/521,663.85 = 134,891.70/x
  3. Step 3: Cross multiply
    347,978.40x = 521,663.85 × 134,891.70
  4. Step 4: Simplify right side
    347,978.40x = 70,368,123,555.05
  5. Step 5: Solve for x
    x = 70,368,123,555.05/347,978.40
  6. Step 6: Final answer
    x = 202,219.80

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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.