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Finding the Fourth Proportional to 760.46, 1,142.93 and 631.29

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Solution

The fourth proportional to 760.46, 1,142.93 and 631.29 is: 948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.46 : 1,142.93 = 631.29 : x
  2. Step 2: Convert to fraction form
    760.46/1,142.93 = 631.29/x
  3. Step 3: Cross multiply
    760.46x = 1,142.93 × 631.29
  4. Step 4: Simplify right side
    760.46x = 721,517.12
  5. Step 5: Solve for x
    x = 721,517.12/760.46
  6. Step 6: Final answer
    x = 948.80

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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.