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Finding the Fourth Proportional to 424.80, 586.38 and 326.76

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Solution

The fourth proportional to 424.80, 586.38 and 326.76 is: 451.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.80 : 586.38 = 326.76 : x
  2. Step 2: Convert to fraction form
    424.80/586.38 = 326.76/x
  3. Step 3: Cross multiply
    424.80x = 586.38 × 326.76
  4. Step 4: Simplify right side
    424.80x = 191,605.53
  5. Step 5: Solve for x
    x = 191,605.53/424.80
  6. Step 6: Final answer
    x = 451.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.