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Finding the Fourth Proportional to 957.61, 1,321.45 and 537.95

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Solution

The fourth proportional to 957.61, 1,321.45 and 537.95 is: 742.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.61 : 1,321.45 = 537.95 : x
  2. Step 2: Convert to fraction form
    957.61/1,321.45 = 537.95/x
  3. Step 3: Cross multiply
    957.61x = 1,321.45 × 537.95
  4. Step 4: Simplify right side
    957.61x = 710,874.03
  5. Step 5: Solve for x
    x = 710,874.03/957.61
  6. Step 6: Final answer
    x = 742.35

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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.