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Finding the Fourth Proportional to 266.61, 398.06 and 250.21

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Solution

The fourth proportional to 266.61, 398.06 and 250.21 is: 373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.61 : 398.06 = 250.21 : x
  2. Step 2: Convert to fraction form
    266.61/398.06 = 250.21/x
  3. Step 3: Cross multiply
    266.61x = 398.06 × 250.21
  4. Step 4: Simplify right side
    266.61x = 99,598.59
  5. Step 5: Solve for x
    x = 99,598.59/266.61
  6. Step 6: Final answer
    x = 373.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.