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Finding the Fourth Proportional to 954.53, 1,317.90 and 689.44

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Solution

The fourth proportional to 954.53, 1,317.90 and 689.44 is: 951.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.53 : 1,317.90 = 689.44 : x
  2. Step 2: Convert to fraction form
    954.53/1,317.90 = 689.44/x
  3. Step 3: Cross multiply
    954.53x = 1,317.90 × 689.44
  4. Step 4: Simplify right side
    954.53x = 908,605.21
  5. Step 5: Solve for x
    x = 908,605.21/954.53
  6. Step 6: Final answer
    x = 951.88

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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.