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Finding the Fourth Proportional to 716.23, 988.11 and 417.43

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Solution

The fourth proportional to 716.23, 988.11 and 417.43 is: 575.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.23 : 988.11 = 417.43 : x
  2. Step 2: Convert to fraction form
    716.23/988.11 = 417.43/x
  3. Step 3: Cross multiply
    716.23x = 988.11 × 417.43
  4. Step 4: Simplify right side
    716.23x = 412,466.76
  5. Step 5: Solve for x
    x = 412,466.76/716.23
  6. Step 6: Final answer
    x = 575.89

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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.