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Finding the Fourth Proportional to 354,998.16, 489,064.88 and 247,372.88

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Solution

The fourth proportional to 354,998.16, 489,064.88 and 247,372.88 is: 340,794.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,998.16 : 489,064.88 = 247,372.88 : x
  2. Step 2: Convert to fraction form
    354,998.16/489,064.88 = 247,372.88/x
  3. Step 3: Cross multiply
    354,998.16x = 489,064.88 × 247,372.88
  4. Step 4: Simplify right side
    354,998.16x = 120,981,387,872.45
  5. Step 5: Solve for x
    x = 120,981,387,872.45/354,998.16
  6. Step 6: Final answer
    x = 340,794.41

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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.