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Finding the Fourth Proportional to 666.68, 1,000.62 and 529.38

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Solution

The fourth proportional to 666.68, 1,000.62 and 529.38 is: 794.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.68 : 1,000.62 = 529.38 : x
  2. Step 2: Convert to fraction form
    666.68/1,000.62 = 529.38/x
  3. Step 3: Cross multiply
    666.68x = 1,000.62 × 529.38
  4. Step 4: Simplify right side
    666.68x = 529,708.22
  5. Step 5: Solve for x
    x = 529,708.22/666.68
  6. Step 6: Final answer
    x = 794.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.