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Finding the Fourth Proportional to 487,693.76, 731,388.81 and 172,076.72

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Solution

The fourth proportional to 487,693.76, 731,388.81 and 172,076.72 is: 258,061.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,693.76 : 731,388.81 = 172,076.72 : x
  2. Step 2: Convert to fraction form
    487,693.76/731,388.81 = 172,076.72/x
  3. Step 3: Cross multiply
    487,693.76x = 731,388.81 × 172,076.72
  4. Step 4: Simplify right side
    487,693.76x = 125,854,987,469.50
  5. Step 5: Solve for x
    x = 125,854,987,469.50/487,693.76
  6. Step 6: Final answer
    x = 258,061.51

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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.