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Finding the Fourth Proportional to 258,319.46, 387,483.14 and 98,404.28

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Solution

The fourth proportional to 258,319.46, 387,483.14 and 98,404.28 is: 147,607.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,319.46 : 387,483.14 = 98,404.28 : x
  2. Step 2: Convert to fraction form
    258,319.46/387,483.14 = 98,404.28/x
  3. Step 3: Cross multiply
    258,319.46x = 387,483.14 × 98,404.28
  4. Step 4: Simplify right side
    258,319.46x = 38,129,996,974.40
  5. Step 5: Solve for x
    x = 38,129,996,974.40/258,319.46
  6. Step 6: Final answer
    x = 147,607.92

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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.