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Finding the Fourth Proportional to 424.56, 586.98 and 326.64

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Solution

The fourth proportional to 424.56, 586.98 and 326.64 is: 451.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.56 : 586.98 = 326.64 : x
  2. Step 2: Convert to fraction form
    424.56/586.98 = 326.64/x
  3. Step 3: Cross multiply
    424.56x = 586.98 × 326.64
  4. Step 4: Simplify right side
    424.56x = 191,731.15
  5. Step 5: Solve for x
    x = 191,731.15/424.56
  6. Step 6: Final answer
    x = 451.60

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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.