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Finding the Fourth Proportional to 353.88, 530.80 and 110.40

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Solution

The fourth proportional to 353.88, 530.80 and 110.40 is: 165.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.88 : 530.80 = 110.40 : x
  2. Step 2: Convert to fraction form
    353.88/530.80 = 110.40/x
  3. Step 3: Cross multiply
    353.88x = 530.80 × 110.40
  4. Step 4: Simplify right side
    353.88x = 58,600.32
  5. Step 5: Solve for x
    x = 58,600.32/353.88
  6. Step 6: Final answer
    x = 165.59

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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.