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Finding the Fourth Proportional to 876.52, 1,315.12 and 465.68

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Solution

The fourth proportional to 876.52, 1,315.12 and 465.68 is: 698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.52 : 1,315.12 = 465.68 : x
  2. Step 2: Convert to fraction form
    876.52/1,315.12 = 465.68/x
  3. Step 3: Cross multiply
    876.52x = 1,315.12 × 465.68
  4. Step 4: Simplify right side
    876.52x = 612,425.08
  5. Step 5: Solve for x
    x = 612,425.08/876.52
  6. Step 6: Final answer
    x = 698.70

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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.