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Finding the Fourth Proportional to 760.10, 1,140.96 and 669.38

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Solution

The fourth proportional to 760.10, 1,140.96 and 669.38 is: 1,004.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.10 : 1,140.96 = 669.38 : x
  2. Step 2: Convert to fraction form
    760.10/1,140.96 = 669.38/x
  3. Step 3: Cross multiply
    760.10x = 1,140.96 × 669.38
  4. Step 4: Simplify right side
    760.10x = 763,735.80
  5. Step 5: Solve for x
    x = 763,735.80/760.10
  6. Step 6: Final answer
    x = 1,004.78

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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.