Home / 492,861.28-680,147.76-278,000.68

Finding the Fourth Proportional to 492,861.28, 680,147.76 and 278,000.68

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Solution

The fourth proportional to 492,861.28, 680,147.76 and 278,000.68 is: 383,640.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,861.28 : 680,147.76 = 278,000.68 : x
  2. Step 2: Convert to fraction form
    492,861.28/680,147.76 = 278,000.68/x
  3. Step 3: Cross multiply
    492,861.28x = 680,147.76 × 278,000.68
  4. Step 4: Simplify right side
    492,861.28x = 189,081,539,780.48
  5. Step 5: Solve for x
    x = 189,081,539,780.48/492,861.28
  6. Step 6: Final answer
    x = 383,640.48

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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.