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Finding the Fourth Proportional to 353.79, 530.75 and 122.72

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Solution

The fourth proportional to 353.79, 530.75 and 122.72 is: 184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.79 : 530.75 = 122.72 : x
  2. Step 2: Convert to fraction form
    353.79/530.75 = 122.72/x
  3. Step 3: Cross multiply
    353.79x = 530.75 × 122.72
  4. Step 4: Simplify right side
    353.79x = 65,131.29
  5. Step 5: Solve for x
    x = 65,131.29/353.79
  6. Step 6: Final answer
    x = 184.10

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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.