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Finding the Fourth Proportional to 742.50, 1,025.16 and 494.10

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Solution

The fourth proportional to 742.50, 1,025.16 and 494.10 is: 682.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.50 : 1,025.16 = 494.10 : x
  2. Step 2: Convert to fraction form
    742.50/1,025.16 = 494.10/x
  3. Step 3: Cross multiply
    742.50x = 1,025.16 × 494.10
  4. Step 4: Simplify right side
    742.50x = 506,529.70
  5. Step 5: Solve for x
    x = 506,529.70/742.50
  6. Step 6: Final answer
    x = 682.19

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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.