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Finding the Fourth Proportional to 415,572.87, 623,394.68 and 131,187.35

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Solution

The fourth proportional to 415,572.87, 623,394.68 and 131,187.35 is: 196,792.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,572.87 : 623,394.68 = 131,187.35 : x
  2. Step 2: Convert to fraction form
    415,572.87/623,394.68 = 131,187.35/x
  3. Step 3: Cross multiply
    415,572.87x = 623,394.68 × 131,187.35
  4. Step 4: Simplify right side
    415,572.87x = 81,781,492,300.39
  5. Step 5: Solve for x
    x = 81,781,492,300.39/415,572.87
  6. Step 6: Final answer
    x = 196,792.18

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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.