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Finding the Fourth Proportional to 287,488.01, 396,736.07 and 158,431.11

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Solution

The fourth proportional to 287,488.01, 396,736.07 and 158,431.11 is: 218,636.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,488.01 : 396,736.07 = 158,431.11 : x
  2. Step 2: Convert to fraction form
    287,488.01/396,736.07 = 158,431.11/x
  3. Step 3: Cross multiply
    287,488.01x = 396,736.07 × 158,431.11
  4. Step 4: Simplify right side
    287,488.01x = 62,855,338,128.65
  5. Step 5: Solve for x
    x = 62,855,338,128.65/287,488.01
  6. Step 6: Final answer
    x = 218,636.38

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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.