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Finding the Fourth Proportional to 2,605.92, 3,909.36 and 875.04

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Solution

The fourth proportional to 2,605.92, 3,909.36 and 875.04 is: 1,312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.92 : 3,909.36 = 875.04 : x
  2. Step 2: Convert to fraction form
    2,605.92/3,909.36 = 875.04/x
  3. Step 3: Cross multiply
    2,605.92x = 3,909.36 × 875.04
  4. Step 4: Simplify right side
    2,605.92x = 3,420,846.37
  5. Step 5: Solve for x
    x = 3,420,846.37/2,605.92
  6. Step 6: Final answer
    x = 1,312.72

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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.