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Finding the Fourth Proportional to 315,357.31, 435,186.92 and 172,118.38

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Solution

The fourth proportional to 315,357.31, 435,186.92 and 172,118.38 is: 237,519.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,357.31 : 435,186.92 = 172,118.38 : x
  2. Step 2: Convert to fraction form
    315,357.31/435,186.92 = 172,118.38/x
  3. Step 3: Cross multiply
    315,357.31x = 435,186.92 × 172,118.38
  4. Step 4: Simplify right side
    315,357.31x = 74,903,667,227.68
  5. Step 5: Solve for x
    x = 74,903,667,227.68/315,357.31
  6. Step 6: Final answer
    x = 237,519.99

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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.