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Finding the Fourth Proportional to 987,357.80, 1,481,036.70 and 871,236.20

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Solution

The fourth proportional to 987,357.80, 1,481,036.70 and 871,236.20 is: 1,306,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,357.80 : 1,481,036.70 = 871,236.20 : x
  2. Step 2: Convert to fraction form
    987,357.80/1,481,036.70 = 871,236.20/x
  3. Step 3: Cross multiply
    987,357.80x = 1,481,036.70 × 871,236.20
  4. Step 4: Simplify right side
    987,357.80x = 1,290,332,786,568.54
  5. Step 5: Solve for x
    x = 1,290,332,786,568.54/987,357.80
  6. Step 6: Final answer
    x = 1,306,854.30

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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.