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Finding the Fourth Proportional to 863.05, 1,294.98 and 498.15

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Solution

The fourth proportional to 863.05, 1,294.98 and 498.15 is: 747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.05 : 1,294.98 = 498.15 : x
  2. Step 2: Convert to fraction form
    863.05/1,294.98 = 498.15/x
  3. Step 3: Cross multiply
    863.05x = 1,294.98 × 498.15
  4. Step 4: Simplify right side
    863.05x = 645,094.29
  5. Step 5: Solve for x
    x = 645,094.29/863.05
  6. Step 6: Final answer
    x = 747.46

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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.