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Finding the Fourth Proportional to 426.52, 639.92 and 152.67

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Solution

The fourth proportional to 426.52, 639.92 and 152.67 is: 229.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.52 : 639.92 = 152.67 : x
  2. Step 2: Convert to fraction form
    426.52/639.92 = 152.67/x
  3. Step 3: Cross multiply
    426.52x = 639.92 × 152.67
  4. Step 4: Simplify right side
    426.52x = 97,696.59
  5. Step 5: Solve for x
    x = 97,696.59/426.52
  6. Step 6: Final answer
    x = 229.06

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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.