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Finding the Fourth Proportional to 887.92, 1,225.22 and 514.90

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Solution

The fourth proportional to 887.92, 1,225.22 and 514.90 is: 710.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.92 : 1,225.22 = 514.90 : x
  2. Step 2: Convert to fraction form
    887.92/1,225.22 = 514.90/x
  3. Step 3: Cross multiply
    887.92x = 1,225.22 × 514.90
  4. Step 4: Simplify right side
    887.92x = 630,865.78
  5. Step 5: Solve for x
    x = 630,865.78/887.92
  6. Step 6: Final answer
    x = 710.50

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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.