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Finding the Fourth Proportional to 285,755.52, 394,340.76 and 158,431.08

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Solution

The fourth proportional to 285,755.52, 394,340.76 and 158,431.08 is: 218,633.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,755.52 : 394,340.76 = 158,431.08 : x
  2. Step 2: Convert to fraction form
    285,755.52/394,340.76 = 158,431.08/x
  3. Step 3: Cross multiply
    285,755.52x = 394,340.76 × 158,431.08
  4. Step 4: Simplify right side
    285,755.52x = 62,475,832,494.82
  5. Step 5: Solve for x
    x = 62,475,832,494.82/285,755.52
  6. Step 6: Final answer
    x = 218,633.86

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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.