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Finding the Fourth Proportional to 862.50, 1,294.28 and 554.55

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Solution

The fourth proportional to 862.50, 1,294.28 and 554.55 is: 832.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.50 : 1,294.28 = 554.55 : x
  2. Step 2: Convert to fraction form
    862.50/1,294.28 = 554.55/x
  3. Step 3: Cross multiply
    862.50x = 1,294.28 × 554.55
  4. Step 4: Simplify right side
    862.50x = 717,737.43
  5. Step 5: Solve for x
    x = 717,737.43/862.50
  6. Step 6: Final answer
    x = 832.16

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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.