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Finding the Fourth Proportional to 399,712.32, 551,843.28 and 249,013.44

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Solution

The fourth proportional to 399,712.32, 551,843.28 and 249,013.44 is: 343,788.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,712.32 : 551,843.28 = 249,013.44 : x
  2. Step 2: Convert to fraction form
    399,712.32/551,843.28 = 249,013.44/x
  3. Step 3: Cross multiply
    399,712.32x = 551,843.28 × 249,013.44
  4. Step 4: Simplify right side
    399,712.32x = 137,416,393,493.68
  5. Step 5: Solve for x
    x = 137,416,393,493.68/399,712.32
  6. Step 6: Final answer
    x = 343,788.24

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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.