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Finding the Fourth Proportional to 283,800.78, 391,647.75 and 156,480.90

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Solution

The fourth proportional to 283,800.78, 391,647.75 and 156,480.90 is: 215,945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,800.78 : 391,647.75 = 156,480.90 : x
  2. Step 2: Convert to fraction form
    283,800.78/391,647.75 = 156,480.90/x
  3. Step 3: Cross multiply
    283,800.78x = 391,647.75 × 156,480.90
  4. Step 4: Simplify right side
    283,800.78x = 61,285,392,402.98
  5. Step 5: Solve for x
    x = 61,285,392,402.98/283,800.78
  6. Step 6: Final answer
    x = 215,945.12

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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.