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Finding the Fourth Proportional to 450.88, 672.38 and 426.40

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Solution

The fourth proportional to 450.88, 672.38 and 426.40 is: 635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.88 : 672.38 = 426.40 : x
  2. Step 2: Convert to fraction form
    450.88/672.38 = 426.40/x
  3. Step 3: Cross multiply
    450.88x = 672.38 × 426.40
  4. Step 4: Simplify right side
    450.88x = 286,702.83
  5. Step 5: Solve for x
    x = 286,702.83/450.88
  6. Step 6: Final answer
    x = 635.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.