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Finding the Fourth Proportional to 709,272.18, 978,793.56 and 386,982.54

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Solution

The fourth proportional to 709,272.18, 978,793.56 and 386,982.54 is: 534,034.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,272.18 : 978,793.56 = 386,982.54 : x
  2. Step 2: Convert to fraction form
    709,272.18/978,793.56 = 386,982.54/x
  3. Step 3: Cross multiply
    709,272.18x = 978,793.56 × 386,982.54
  4. Step 4: Simplify right side
    709,272.18x = 378,776,017,984.44
  5. Step 5: Solve for x
    x = 378,776,017,984.44/709,272.18
  6. Step 6: Final answer
    x = 534,034.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.