Home / 876,686.20-1,315,029.30-315,647.80

Finding the Fourth Proportional to 876,686.20, 1,315,029.30 and 315,647.80

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Solution

The fourth proportional to 876,686.20, 1,315,029.30 and 315,647.80 is: 473,471.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,686.20 : 1,315,029.30 = 315,647.80 : x
  2. Step 2: Convert to fraction form
    876,686.20/1,315,029.30 = 315,647.80/x
  3. Step 3: Cross multiply
    876,686.20x = 1,315,029.30 × 315,647.80
  4. Step 4: Simplify right side
    876,686.20x = 415,086,105,480.54
  5. Step 5: Solve for x
    x = 415,086,105,480.54/876,686.20
  6. Step 6: Final answer
    x = 473,471.70

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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.