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Finding the Fourth Proportional to 353.55, 530.55 and 191.28

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Solution

The fourth proportional to 353.55, 530.55 and 191.28 is: 287.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.55 : 530.55 = 191.28 : x
  2. Step 2: Convert to fraction form
    353.55/530.55 = 191.28/x
  3. Step 3: Cross multiply
    353.55x = 530.55 × 191.28
  4. Step 4: Simplify right side
    353.55x = 101,483.60
  5. Step 5: Solve for x
    x = 101,483.60/353.55
  6. Step 6: Final answer
    x = 287.04

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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.