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Finding the Fourth Proportional to 981.07, 1,471.88 and 548.53

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Solution

The fourth proportional to 981.07, 1,471.88 and 548.53 is: 822.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.07 : 1,471.88 = 548.53 : x
  2. Step 2: Convert to fraction form
    981.07/1,471.88 = 548.53/x
  3. Step 3: Cross multiply
    981.07x = 1,471.88 × 548.53
  4. Step 4: Simplify right side
    981.07x = 807,370.34
  5. Step 5: Solve for x
    x = 807,370.34/981.07
  6. Step 6: Final answer
    x = 822.95

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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.