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Finding the Fourth Proportional to 718.34, 990.97 and 452.66

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Solution

The fourth proportional to 718.34, 990.97 and 452.66 is: 624.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.34 : 990.97 = 452.66 : x
  2. Step 2: Convert to fraction form
    718.34/990.97 = 452.66/x
  3. Step 3: Cross multiply
    718.34x = 990.97 × 452.66
  4. Step 4: Simplify right side
    718.34x = 448,566.39
  5. Step 5: Solve for x
    x = 448,566.39/718.34
  6. Step 6: Final answer
    x = 624.45

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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.