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Finding the Fourth Proportional to 492,959.67, 680,290.91 and 278,099.07

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Solution

The fourth proportional to 492,959.67, 680,290.91 and 278,099.07 is: 383,780.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,959.67 : 680,290.91 = 278,099.07 : x
  2. Step 2: Convert to fraction form
    492,959.67/680,290.91 = 278,099.07/x
  3. Step 3: Cross multiply
    492,959.67x = 680,290.91 × 278,099.07
  4. Step 4: Simplify right side
    492,959.67x = 189,188,269,400.45
  5. Step 5: Solve for x
    x = 189,188,269,400.45/492,959.67
  6. Step 6: Final answer
    x = 383,780.42

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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.