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Finding the Fourth Proportional to 283,695.12, 391,494.42 and 156,382.56

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Solution

The fourth proportional to 283,695.12, 391,494.42 and 156,382.56 is: 215,805.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,695.12 : 391,494.42 = 156,382.56 : x
  2. Step 2: Convert to fraction form
    283,695.12/391,494.42 = 156,382.56/x
  3. Step 3: Cross multiply
    283,695.12x = 391,494.42 × 156,382.56
  4. Step 4: Simplify right side
    283,695.12x = 61,222,899,625.32
  5. Step 5: Solve for x
    x = 61,222,899,625.32/283,695.12
  6. Step 6: Final answer
    x = 215,805.26

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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.