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Finding the Fourth Proportional to 715,668.48, 987,842.56 and 461,018.88

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Solution

The fourth proportional to 715,668.48, 987,842.56 and 461,018.88 is: 636,347.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,668.48 : 987,842.56 = 461,018.88 : x
  2. Step 2: Convert to fraction form
    715,668.48/987,842.56 = 461,018.88/x
  3. Step 3: Cross multiply
    715,668.48x = 987,842.56 × 461,018.88
  4. Step 4: Simplify right side
    715,668.48x = 455,414,070,627.53
  5. Step 5: Solve for x
    x = 455,414,070,627.53/715,668.48
  6. Step 6: Final answer
    x = 636,347.81

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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.