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Finding the Fourth Proportional to 266.94, 400.42 and 157.20

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Solution

The fourth proportional to 266.94, 400.42 and 157.20 is: 235.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.94 : 400.42 = 157.20 : x
  2. Step 2: Convert to fraction form
    266.94/400.42 = 157.20/x
  3. Step 3: Cross multiply
    266.94x = 400.42 × 157.20
  4. Step 4: Simplify right side
    266.94x = 62,946.02
  5. Step 5: Solve for x
    x = 62,946.02/266.94
  6. Step 6: Final answer
    x = 235.81

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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.