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Finding the Fourth Proportional to 353.48, 530.18 and 216.45

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Solution

The fourth proportional to 353.48, 530.18 and 216.45 is: 324.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.48 : 530.18 = 216.45 : x
  2. Step 2: Convert to fraction form
    353.48/530.18 = 216.45/x
  3. Step 3: Cross multiply
    353.48x = 530.18 × 216.45
  4. Step 4: Simplify right side
    353.48x = 114,760.40
  5. Step 5: Solve for x
    x = 114,760.40/353.48
  6. Step 6: Final answer
    x = 324.66

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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.