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Finding the Fourth Proportional to 421,296.87, 631,916.13 and 155,007.75

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Solution

The fourth proportional to 421,296.87, 631,916.13 and 155,007.75 is: 232,500.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,296.87 : 631,916.13 = 155,007.75 : x
  2. Step 2: Convert to fraction form
    421,296.87/631,916.13 = 155,007.75/x
  3. Step 3: Cross multiply
    421,296.87x = 631,916.13 × 155,007.75
  4. Step 4: Simplify right side
    421,296.87x = 97,951,897,500.01
  5. Step 5: Solve for x
    x = 97,951,897,500.01/421,296.87
  6. Step 6: Final answer
    x = 232,500.89

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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.