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Finding the Fourth Proportional to 957.31, 1,434.76 and 437.21

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Solution

The fourth proportional to 957.31, 1,434.76 and 437.21 is: 655.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.31 : 1,434.76 = 437.21 : x
  2. Step 2: Convert to fraction form
    957.31/1,434.76 = 437.21/x
  3. Step 3: Cross multiply
    957.31x = 1,434.76 × 437.21
  4. Step 4: Simplify right side
    957.31x = 627,295.55
  5. Step 5: Solve for x
    x = 627,295.55/957.31
  6. Step 6: Final answer
    x = 655.27

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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.