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Finding the Fourth Proportional to 647,988.38, 972,416.40 and 268,909.48

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Solution

The fourth proportional to 647,988.38, 972,416.40 and 268,909.48 is: 403,544.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,988.38 : 972,416.40 = 268,909.48 : x
  2. Step 2: Convert to fraction form
    647,988.38/972,416.40 = 268,909.48/x
  3. Step 3: Cross multiply
    647,988.38x = 972,416.40 × 268,909.48
  4. Step 4: Simplify right side
    647,988.38x = 261,491,988,467.47
  5. Step 5: Solve for x
    x = 261,491,988,467.47/647,988.38
  6. Step 6: Final answer
    x = 403,544.26

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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.