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Finding the Fourth Proportional to 666.91, 999.99 and 250.12

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Solution

The fourth proportional to 666.91, 999.99 and 250.12 is: 375.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.91 : 999.99 = 250.12 : x
  2. Step 2: Convert to fraction form
    666.91/999.99 = 250.12/x
  3. Step 3: Cross multiply
    666.91x = 999.99 × 250.12
  4. Step 4: Simplify right side
    666.91x = 250,117.50
  5. Step 5: Solve for x
    x = 250,117.50/666.91
  6. Step 6: Final answer
    x = 375.04

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1.5x scale

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.