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Finding the Fourth Proportional to 715.98, 988.54 and 549.90

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Solution

The fourth proportional to 715.98, 988.54 and 549.90 is: 759.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.98 : 988.54 = 549.90 : x
  2. Step 2: Convert to fraction form
    715.98/988.54 = 549.90/x
  3. Step 3: Cross multiply
    715.98x = 988.54 × 549.90
  4. Step 4: Simplify right side
    715.98x = 543,598.15
  5. Step 5: Solve for x
    x = 543,598.15/715.98
  6. Step 6: Final answer
    x = 759.24

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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.