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Finding the Fourth Proportional to 287,491.26, 396,740.55 and 158,434.37

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Solution

The fourth proportional to 287,491.26, 396,740.55 and 158,434.37 is: 218,640.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,491.26 : 396,740.55 = 158,434.37 : x
  2. Step 2: Convert to fraction form
    287,491.26/396,740.55 = 158,434.37/x
  3. Step 3: Cross multiply
    287,491.26x = 396,740.55 × 158,434.37
  4. Step 4: Simplify right side
    287,491.26x = 62,857,339,092.70
  5. Step 5: Solve for x
    x = 62,857,339,092.70/287,491.26
  6. Step 6: Final answer
    x = 218,640.87

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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.