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Finding the Fourth Proportional to 876,871.20, 1,315,306.80 and 841,879.20

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Solution

The fourth proportional to 876,871.20, 1,315,306.80 and 841,879.20 is: 1,262,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,871.20 : 1,315,306.80 = 841,879.20 : x
  2. Step 2: Convert to fraction form
    876,871.20/1,315,306.80 = 841,879.20/x
  3. Step 3: Cross multiply
    876,871.20x = 1,315,306.80 × 841,879.20
  4. Step 4: Simplify right side
    876,871.20x = 1,107,329,436,538.56
  5. Step 5: Solve for x
    x = 1,107,329,436,538.56/876,871.20
  6. Step 6: Final answer
    x = 1,262,818.80

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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.