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Finding the Fourth Proportional to 807.22, 1,113.96 and 457.90

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Solution

The fourth proportional to 807.22, 1,113.96 and 457.90 is: 631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.22 : 1,113.96 = 457.90 : x
  2. Step 2: Convert to fraction form
    807.22/1,113.96 = 457.90/x
  3. Step 3: Cross multiply
    807.22x = 1,113.96 × 457.90
  4. Step 4: Simplify right side
    807.22x = 510,082.28
  5. Step 5: Solve for x
    x = 510,082.28/807.22
  6. Step 6: Final answer
    x = 631.90

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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.