Home / 492,939.15-680,287.53-278,000.79

Finding the Fourth Proportional to 492,939.15, 680,287.53 and 278,000.79

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Solution

The fourth proportional to 492,939.15, 680,287.53 and 278,000.79 is: 383,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,939.15 : 680,287.53 = 278,000.79 : x
  2. Step 2: Convert to fraction form
    492,939.15/680,287.53 = 278,000.79/x
  3. Step 3: Cross multiply
    492,939.15x = 680,287.53 × 278,000.79
  4. Step 4: Simplify right side
    492,939.15x = 189,120,468,188.48
  5. Step 5: Solve for x
    x = 189,120,468,188.48/492,939.15
  6. Step 6: Final answer
    x = 383,658.85

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1.5x scale

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.