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Finding the Fourth Proportional to 577,112.70, 865,712.56 and 172,272.92

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Solution

The fourth proportional to 577,112.70, 865,712.56 and 172,272.92 is: 258,422.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,112.70 : 865,712.56 = 172,272.92 : x
  2. Step 2: Convert to fraction form
    577,112.70/865,712.56 = 172,272.92/x
  3. Step 3: Cross multiply
    577,112.70x = 865,712.56 × 172,272.92
  4. Step 4: Simplify right side
    577,112.70x = 149,138,830,591.88
  5. Step 5: Solve for x
    x = 149,138,830,591.88/577,112.70
  6. Step 6: Final answer
    x = 258,422.37

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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.