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Finding the Fourth Proportional to 1,032.85, 1,549.73 and 761.20

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Solution

The fourth proportional to 1,032.85, 1,549.73 and 761.20 is: 1,142.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.85 : 1,549.73 = 761.20 : x
  2. Step 2: Convert to fraction form
    1,032.85/1,549.73 = 761.20/x
  3. Step 3: Cross multiply
    1,032.85x = 1,549.73 × 761.20
  4. Step 4: Simplify right side
    1,032.85x = 1,179,652.50
  5. Step 5: Solve for x
    x = 1,179,652.50/1,032.85
  6. Step 6: Final answer
    x = 1,142.13

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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.