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Finding the Fourth Proportional to 283,469.15, 391,188.49 and 156,144.44

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Solution

The fourth proportional to 283,469.15, 391,188.49 and 156,144.44 is: 215,479.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,469.15 : 391,188.49 = 156,144.44 : x
  2. Step 2: Convert to fraction form
    283,469.15/391,188.49 = 156,144.44/x
  3. Step 3: Cross multiply
    283,469.15x = 391,188.49 × 156,144.44
  4. Step 4: Simplify right side
    283,469.15x = 61,081,908,293.11
  5. Step 5: Solve for x
    x = 61,081,908,293.11/283,469.15
  6. Step 6: Final answer
    x = 215,479.91

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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.