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Finding the Fourth Proportional to 541.78, 812.70 and 157

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Solution

The fourth proportional to 541.78, 812.70 and 157 is: 235.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.78 : 812.70 = 157 : x
  2. Step 2: Convert to fraction form
    541.78/812.70 = 157/x
  3. Step 3: Cross multiply
    541.78x = 812.70 × 157
  4. Step 4: Simplify right side
    541.78x = 127,593.90
  5. Step 5: Solve for x
    x = 127,593.90/541.78
  6. Step 6: Final answer
    x = 235.51

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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.