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Finding the Fourth Proportional to 354.09, 531.13 and 158.98

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Solution

The fourth proportional to 354.09, 531.13 and 158.98 is: 238.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.09 : 531.13 = 158.98 : x
  2. Step 2: Convert to fraction form
    354.09/531.13 = 158.98/x
  3. Step 3: Cross multiply
    354.09x = 531.13 × 158.98
  4. Step 4: Simplify right side
    354.09x = 84,437.32
  5. Step 5: Solve for x
    x = 84,437.32/354.09
  6. Step 6: Final answer
    x = 238.47

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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.