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Finding the Fourth Proportional to 315,637.05, 435,579.13 and 172,397.43

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Solution

The fourth proportional to 315,637.05, 435,579.13 and 172,397.43 is: 237,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,637.05 : 435,579.13 = 172,397.43 : x
  2. Step 2: Convert to fraction form
    315,637.05/435,579.13 = 172,397.43/x
  3. Step 3: Cross multiply
    315,637.05x = 435,579.13 × 172,397.43
  4. Step 4: Simplify right side
    315,637.05x = 75,092,722,573.64
  5. Step 5: Solve for x
    x = 75,092,722,573.64/315,637.05
  6. Step 6: Final answer
    x = 237,908.45

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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.