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Finding the Fourth Proportional to 957.39, 1,321.16 and 537.74

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Solution

The fourth proportional to 957.39, 1,321.16 and 537.74 is: 742.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.39 : 1,321.16 = 537.74 : x
  2. Step 2: Convert to fraction form
    957.39/1,321.16 = 537.74/x
  3. Step 3: Cross multiply
    957.39x = 1,321.16 × 537.74
  4. Step 4: Simplify right side
    957.39x = 710,440.58
  5. Step 5: Solve for x
    x = 710,440.58/957.39
  6. Step 6: Final answer
    x = 742.06

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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.