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Finding the Fourth Proportional to 876.29, 1,315.31 and 551.88

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Solution

The fourth proportional to 876.29, 1,315.31 and 551.88 is: 828.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.29 : 1,315.31 = 551.88 : x
  2. Step 2: Convert to fraction form
    876.29/1,315.31 = 551.88/x
  3. Step 3: Cross multiply
    876.29x = 1,315.31 × 551.88
  4. Step 4: Simplify right side
    876.29x = 725,890.52
  5. Step 5: Solve for x
    x = 725,890.52/876.29
  6. Step 6: Final answer
    x = 828.37

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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.