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Finding the Fourth Proportional to 353.70, 530.50 and 148.30

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Solution

The fourth proportional to 353.70, 530.50 and 148.30 is: 222.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.70 : 530.50 = 148.30 : x
  2. Step 2: Convert to fraction form
    353.70/530.50 = 148.30/x
  3. Step 3: Cross multiply
    353.70x = 530.50 × 148.30
  4. Step 4: Simplify right side
    353.70x = 78,673.15
  5. Step 5: Solve for x
    x = 78,673.15/353.70
  6. Step 6: Final answer
    x = 222.43

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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.