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Finding the Fourth Proportional to 353.81, 530.75 and 97.31

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Solution

The fourth proportional to 353.81, 530.75 and 97.31 is: 145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.81 : 530.75 = 97.31 : x
  2. Step 2: Convert to fraction form
    353.81/530.75 = 97.31/x
  3. Step 3: Cross multiply
    353.81x = 530.75 × 97.31
  4. Step 4: Simplify right side
    353.81x = 51,648.85
  5. Step 5: Solve for x
    x = 51,648.85/353.81
  6. Step 6: Final answer
    x = 145.98

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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.