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Finding the Fourth Proportional to 430.57, 645.92 and 167.06

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Solution

The fourth proportional to 430.57, 645.92 and 167.06 is: 250.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.57 : 645.92 = 167.06 : x
  2. Step 2: Convert to fraction form
    430.57/645.92 = 167.06/x
  3. Step 3: Cross multiply
    430.57x = 645.92 × 167.06
  4. Step 4: Simplify right side
    430.57x = 107,909.74
  5. Step 5: Solve for x
    x = 107,909.74/430.57
  6. Step 6: Final answer
    x = 250.62

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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.