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Finding the Fourth Proportional to 315,963.26, 436,029.42 and 172,723.28

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Solution

The fourth proportional to 315,963.26, 436,029.42 and 172,723.28 is: 238,358.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,963.26 : 436,029.42 = 172,723.28 : x
  2. Step 2: Convert to fraction form
    315,963.26/436,029.42 = 172,723.28/x
  3. Step 3: Cross multiply
    315,963.26x = 436,029.42 × 172,723.28
  4. Step 4: Simplify right side
    315,963.26x = 75,312,431,598.90
  5. Step 5: Solve for x
    x = 75,312,431,598.90/315,963.26
  6. Step 6: Final answer
    x = 238,358.19

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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.