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Finding the Fourth Proportional to 367,891.28, 551,390.52 and 261,106.64

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Solution

The fourth proportional to 367,891.28, 551,390.52 and 261,106.64 is: 391,343.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,891.28 : 551,390.52 = 261,106.64 : x
  2. Step 2: Convert to fraction form
    367,891.28/551,390.52 = 261,106.64/x
  3. Step 3: Cross multiply
    367,891.28x = 551,390.52 × 261,106.64
  4. Step 4: Simplify right side
    367,891.28x = 143,971,726,005.05
  5. Step 5: Solve for x
    x = 143,971,726,005.05/367,891.28
  6. Step 6: Final answer
    x = 391,343.13

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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.