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Finding the Fourth Proportional to 876.43, 1,210.41 and 870.37

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Solution

The fourth proportional to 876.43, 1,210.41 and 870.37 is: 1,202.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.43 : 1,210.41 = 870.37 : x
  2. Step 2: Convert to fraction form
    876.43/1,210.41 = 870.37/x
  3. Step 3: Cross multiply
    876.43x = 1,210.41 × 870.37
  4. Step 4: Simplify right side
    876.43x = 1,053,504.55
  5. Step 5: Solve for x
    x = 1,053,504.55/876.43
  6. Step 6: Final answer
    x = 1,202.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.