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Finding the Fourth Proportional to 291,016.80, 401,606.51 and 163,691.28

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Solution

The fourth proportional to 291,016.80, 401,606.51 and 163,691.28 is: 225,895.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,016.80 : 401,606.51 = 163,691.28 : x
  2. Step 2: Convert to fraction form
    291,016.80/401,606.51 = 163,691.28/x
  3. Step 3: Cross multiply
    291,016.80x = 401,606.51 × 163,691.28
  4. Step 4: Simplify right side
    291,016.80x = 65,739,482,859.78
  5. Step 5: Solve for x
    x = 65,739,482,859.78/291,016.80
  6. Step 6: Final answer
    x = 225,895.83

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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.