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Finding the Fourth Proportional to 661.38, 914.67 and 552.30

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Solution

The fourth proportional to 661.38, 914.67 and 552.30 is: 763.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.38 : 914.67 = 552.30 : x
  2. Step 2: Convert to fraction form
    661.38/914.67 = 552.30/x
  3. Step 3: Cross multiply
    661.38x = 914.67 × 552.30
  4. Step 4: Simplify right side
    661.38x = 505,172.24
  5. Step 5: Solve for x
    x = 505,172.24/661.38
  6. Step 6: Final answer
    x = 763.82

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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.