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Finding the Fourth Proportional to 982.47, 1,354.70 and 757.90

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Solution

The fourth proportional to 982.47, 1,354.70 and 757.90 is: 1,045.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.47 : 1,354.70 = 757.90 : x
  2. Step 2: Convert to fraction form
    982.47/1,354.70 = 757.90/x
  3. Step 3: Cross multiply
    982.47x = 1,354.70 × 757.90
  4. Step 4: Simplify right side
    982.47x = 1,026,730.72
  5. Step 5: Solve for x
    x = 1,026,730.72/982.47
  6. Step 6: Final answer
    x = 1,045.05

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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.