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Finding the Fourth Proportional to 878,952.78, 1,318,480.65 and 339,211.89

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Solution

The fourth proportional to 878,952.78, 1,318,480.65 and 339,211.89 is: 508,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,952.78 : 1,318,480.65 = 339,211.89 : x
  2. Step 2: Convert to fraction form
    878,952.78/1,318,480.65 = 339,211.89/x
  3. Step 3: Cross multiply
    878,952.78x = 1,318,480.65 × 339,211.89
  4. Step 4: Simplify right side
    878,952.78x = 447,244,313,214.93
  5. Step 5: Solve for x
    x = 447,244,313,214.93/878,952.78
  6. Step 6: Final answer
    x = 508,837.70

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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.