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Finding the Fourth Proportional to 742.82, 1,025.21 and 463.10

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Solution

The fourth proportional to 742.82, 1,025.21 and 463.10 is: 639.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.82 : 1,025.21 = 463.10 : x
  2. Step 2: Convert to fraction form
    742.82/1,025.21 = 463.10/x
  3. Step 3: Cross multiply
    742.82x = 1,025.21 × 463.10
  4. Step 4: Simplify right side
    742.82x = 474,772.44
  5. Step 5: Solve for x
    x = 474,772.44/742.82
  6. Step 6: Final answer
    x = 639.15

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1.5x scale

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.