Home / 858,288.20-1,287,432.30-480,374.60

Finding the Fourth Proportional to 858,288.20, 1,287,432.30 and 480,374.60

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Solution

The fourth proportional to 858,288.20, 1,287,432.30 and 480,374.60 is: 720,561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,288.20 : 1,287,432.30 = 480,374.60 : x
  2. Step 2: Convert to fraction form
    858,288.20/1,287,432.30 = 480,374.60/x
  3. Step 3: Cross multiply
    858,288.20x = 1,287,432.30 × 480,374.60
  4. Step 4: Simplify right side
    858,288.20x = 618,449,776,139.58
  5. Step 5: Solve for x
    x = 618,449,776,139.58/858,288.20
  6. Step 6: Final answer
    x = 720,561.90

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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.