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Finding the Fourth Proportional to 515,291.11, 772,925.05 and 178,311.43

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Solution

The fourth proportional to 515,291.11, 772,925.05 and 178,311.43 is: 267,463.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,291.11 : 772,925.05 = 178,311.43 : x
  2. Step 2: Convert to fraction form
    515,291.11/772,925.05 = 178,311.43/x
  3. Step 3: Cross multiply
    515,291.11x = 772,925.05 × 178,311.43
  4. Step 4: Simplify right side
    515,291.11x = 137,821,370,948.32
  5. Step 5: Solve for x
    x = 137,821,370,948.32/515,291.11
  6. Step 6: Final answer
    x = 267,463.13

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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.