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Finding the Fourth Proportional to 715,243.50, 987,036.84 and 392,954.22

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Solution

The fourth proportional to 715,243.50, 987,036.84 and 392,954.22 is: 542,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,243.50 : 987,036.84 = 392,954.22 : x
  2. Step 2: Convert to fraction form
    715,243.50/987,036.84 = 392,954.22/x
  3. Step 3: Cross multiply
    715,243.50x = 987,036.84 × 392,954.22
  4. Step 4: Simplify right side
    715,243.50x = 387,860,291,573.47
  5. Step 5: Solve for x
    x = 387,860,291,573.47/715,243.50
  6. Step 6: Final answer
    x = 542,277.27

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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.