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Finding the Fourth Proportional to 754.17, 1,041.62 and 666.69

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Solution

The fourth proportional to 754.17, 1,041.62 and 666.69 is: 920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.17 : 1,041.62 = 666.69 : x
  2. Step 2: Convert to fraction form
    754.17/1,041.62 = 666.69/x
  3. Step 3: Cross multiply
    754.17x = 1,041.62 × 666.69
  4. Step 4: Simplify right side
    754.17x = 694,437.64
  5. Step 5: Solve for x
    x = 694,437.64/754.17
  6. Step 6: Final answer
    x = 920.80

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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.