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Finding the Fourth Proportional to 426.47, 639.77 and 304.52

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Solution

The fourth proportional to 426.47, 639.77 and 304.52 is: 456.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.47 : 639.77 = 304.52 : x
  2. Step 2: Convert to fraction form
    426.47/639.77 = 304.52/x
  3. Step 3: Cross multiply
    426.47x = 639.77 × 304.52
  4. Step 4: Simplify right side
    426.47x = 194,818.04
  5. Step 5: Solve for x
    x = 194,818.04/426.47
  6. Step 6: Final answer
    x = 456.82

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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.