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Finding the Fourth Proportional to 2,631.18, 3,946.95 and 876.12

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Solution

The fourth proportional to 2,631.18, 3,946.95 and 876.12 is: 1,314.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.18 : 3,946.95 = 876.12 : x
  2. Step 2: Convert to fraction form
    2,631.18/3,946.95 = 876.12/x
  3. Step 3: Cross multiply
    2,631.18x = 3,946.95 × 876.12
  4. Step 4: Simplify right side
    2,631.18x = 3,457,987.03
  5. Step 5: Solve for x
    x = 3,457,987.03/2,631.18
  6. Step 6: Final answer
    x = 1,314.23

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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.