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Finding the Fourth Proportional to 487.26, 672.36 and 310.17

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Solution

The fourth proportional to 487.26, 672.36 and 310.17 is: 428.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.26 : 672.36 = 310.17 : x
  2. Step 2: Convert to fraction form
    487.26/672.36 = 310.17/x
  3. Step 3: Cross multiply
    487.26x = 672.36 × 310.17
  4. Step 4: Simplify right side
    487.26x = 208,545.90
  5. Step 5: Solve for x
    x = 208,545.90/487.26
  6. Step 6: Final answer
    x = 428.00

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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.