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Finding the Fourth Proportional to 715.61, 988.02 and 549.53

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Solution

The fourth proportional to 715.61, 988.02 and 549.53 is: 758.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.61 : 988.02 = 549.53 : x
  2. Step 2: Convert to fraction form
    715.61/988.02 = 549.53/x
  3. Step 3: Cross multiply
    715.61x = 988.02 × 549.53
  4. Step 4: Simplify right side
    715.61x = 542,938.94
  5. Step 5: Solve for x
    x = 542,938.94/715.61
  6. Step 6: Final answer
    x = 758.71

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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.