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Finding the Fourth Proportional to 551,339.12, 760,648.92 and 312,736.88

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Solution

The fourth proportional to 551,339.12, 760,648.92 and 312,736.88 is: 431,463.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,339.12 : 760,648.92 = 312,736.88 : x
  2. Step 2: Convert to fraction form
    551,339.12/760,648.92 = 312,736.88/x
  3. Step 3: Cross multiply
    551,339.12x = 760,648.92 × 312,736.88
  4. Step 4: Simplify right side
    551,339.12x = 237,882,970,016.17
  5. Step 5: Solve for x
    x = 237,882,970,016.17/551,339.12
  6. Step 6: Final answer
    x = 431,463.98

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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.