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Finding the Fourth Proportional to 265.57, 397.72 and 157.03

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Solution

The fourth proportional to 265.57, 397.72 and 157.03 is: 235.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.57 : 397.72 = 157.03 : x
  2. Step 2: Convert to fraction form
    265.57/397.72 = 157.03/x
  3. Step 3: Cross multiply
    265.57x = 397.72 × 157.03
  4. Step 4: Simplify right side
    265.57x = 62,453.97
  5. Step 5: Solve for x
    x = 62,453.97/265.57
  6. Step 6: Final answer
    x = 235.17

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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.