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Finding the Fourth Proportional to 987,747.80, 1,481,621.70 and 972,001.40

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Solution

The fourth proportional to 987,747.80, 1,481,621.70 and 972,001.40 is: 1,458,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,747.80 : 1,481,621.70 = 972,001.40 : x
  2. Step 2: Convert to fraction form
    987,747.80/1,481,621.70 = 972,001.40/x
  3. Step 3: Cross multiply
    987,747.80x = 1,481,621.70 × 972,001.40
  4. Step 4: Simplify right side
    987,747.80x = 1,440,138,366,670.38
  5. Step 5: Solve for x
    x = 1,440,138,366,670.38/987,747.80
  6. Step 6: Final answer
    x = 1,458,002.10

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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.