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Finding the Fourth Proportional to 430.54, 645.60 and 167.11

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Solution

The fourth proportional to 430.54, 645.60 and 167.11 is: 250.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.54 : 645.60 = 167.11 : x
  2. Step 2: Convert to fraction form
    430.54/645.60 = 167.11/x
  3. Step 3: Cross multiply
    430.54x = 645.60 × 167.11
  4. Step 4: Simplify right side
    430.54x = 107,888.16
  5. Step 5: Solve for x
    x = 107,888.16/430.54
  6. Step 6: Final answer
    x = 250.59

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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.