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Finding the Fourth Proportional to 487,915.11, 673,194.85 and 281,132.84

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Solution

The fourth proportional to 487,915.11, 673,194.85 and 281,132.84 is: 387,889.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,915.11 : 673,194.85 = 281,132.84 : x
  2. Step 2: Convert to fraction form
    487,915.11/673,194.85 = 281,132.84/x
  3. Step 3: Cross multiply
    487,915.11x = 673,194.85 × 281,132.84
  4. Step 4: Simplify right side
    487,915.11x = 189,257,181,034.03
  5. Step 5: Solve for x
    x = 189,257,181,034.03/487,915.11
  6. Step 6: Final answer
    x = 387,889.57

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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.