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Finding the Fourth Proportional to 257,328.47, 386,021.15 and 88,829.69

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Solution

The fourth proportional to 257,328.47, 386,021.15 and 88,829.69 is: 133,254.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,328.47 : 386,021.15 = 88,829.69 : x
  2. Step 2: Convert to fraction form
    257,328.47/386,021.15 = 88,829.69/x
  3. Step 3: Cross multiply
    257,328.47x = 386,021.15 × 88,829.69
  4. Step 4: Simplify right side
    257,328.47x = 34,290,137,046.80
  5. Step 5: Solve for x
    x = 34,290,137,046.80/257,328.47
  6. Step 6: Final answer
    x = 133,254.35

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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.