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Finding the Fourth Proportional to 291,691.88, 402,570.43 and 164,390.66

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Solution

The fourth proportional to 291,691.88, 402,570.43 and 164,390.66 is: 226,879.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,691.88 : 402,570.43 = 164,390.66 : x
  2. Step 2: Convert to fraction form
    291,691.88/402,570.43 = 164,390.66/x
  3. Step 3: Cross multiply
    291,691.88x = 402,570.43 × 164,390.66
  4. Step 4: Simplify right side
    291,691.88x = 66,178,816,260.36
  5. Step 5: Solve for x
    x = 66,178,816,260.36/291,691.88
  6. Step 6: Final answer
    x = 226,879.19

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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.