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Finding the Fourth Proportional to 356.47, 534.82 and 161.45

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Solution

The fourth proportional to 356.47, 534.82 and 161.45 is: 242.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.47 : 534.82 = 161.45 : x
  2. Step 2: Convert to fraction form
    356.47/534.82 = 161.45/x
  3. Step 3: Cross multiply
    356.47x = 534.82 × 161.45
  4. Step 4: Simplify right side
    356.47x = 86,343.61
  5. Step 5: Solve for x
    x = 86,343.61/356.47
  6. Step 6: Final answer
    x = 242.22

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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.