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Finding the Fourth Proportional to 2,315.88, 3,472.80 and 672.06

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Solution

The fourth proportional to 2,315.88, 3,472.80 and 672.06 is: 1,007.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.88 : 3,472.80 = 672.06 : x
  2. Step 2: Convert to fraction form
    2,315.88/3,472.80 = 672.06/x
  3. Step 3: Cross multiply
    2,315.88x = 3,472.80 × 672.06
  4. Step 4: Simplify right side
    2,315.88x = 2,333,929.97
  5. Step 5: Solve for x
    x = 2,333,929.97/2,315.88
  6. Step 6: Final answer
    x = 1,007.79

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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.