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Finding the Fourth Proportional to 878,481.80, 1,316,945.10 and 784,003.40

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Solution

The fourth proportional to 878,481.80, 1,316,945.10 and 784,003.40 is: 1,175,311.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,481.80 : 1,316,945.10 = 784,003.40 : x
  2. Step 2: Convert to fraction form
    878,481.80/1,316,945.10 = 784,003.40/x
  3. Step 3: Cross multiply
    878,481.80x = 1,316,945.10 × 784,003.40
  4. Step 4: Simplify right side
    878,481.80x = 1,032,489,436,013.34
  5. Step 5: Solve for x
    x = 1,032,489,436,013.34/878,481.80
  6. Step 6: Final answer
    x = 1,175,311.13

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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.