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Finding the Fourth Proportional to 666.71, 1,000.57 and 337.98

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Solution

The fourth proportional to 666.71, 1,000.57 and 337.98 is: 507.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.71 : 1,000.57 = 337.98 : x
  2. Step 2: Convert to fraction form
    666.71/1,000.57 = 337.98/x
  3. Step 3: Cross multiply
    666.71x = 1,000.57 × 337.98
  4. Step 4: Simplify right side
    666.71x = 338,172.65
  5. Step 5: Solve for x
    x = 338,172.65/666.71
  6. Step 6: Final answer
    x = 507.23

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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.