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Finding the Fourth Proportional to 425, 586.74 and 321.32

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Solution

The fourth proportional to 425, 586.74 and 321.32 is: 443.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425 : 586.74 = 321.32 : x
  2. Step 2: Convert to fraction form
    425/586.74 = 321.32/x
  3. Step 3: Cross multiply
    425x = 586.74 × 321.32
  4. Step 4: Simplify right side
    425x = 188,531.30
  5. Step 5: Solve for x
    x = 188,531.30/425
  6. Step 6: Final answer
    x = 443.60

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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.