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Finding the Fourth Proportional to 318,998.38, 478,560.48 and 91,296.14

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Solution

The fourth proportional to 318,998.38, 478,560.48 and 91,296.14 is: 136,962.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,998.38 : 478,560.48 = 91,296.14 : x
  2. Step 2: Convert to fraction form
    318,998.38/478,560.48 = 91,296.14/x
  3. Step 3: Cross multiply
    318,998.38x = 478,560.48 × 91,296.14
  4. Step 4: Simplify right side
    318,998.38x = 43,690,724,580.55
  5. Step 5: Solve for x
    x = 43,690,724,580.55/318,998.38
  6. Step 6: Final answer
    x = 136,962.21

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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.