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Finding the Fourth Proportional to 315,634.38, 435,575.43 and 172,394.76

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Solution

The fourth proportional to 315,634.38, 435,575.43 and 172,394.76 is: 237,904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,634.38 : 435,575.43 = 172,394.76 : x
  2. Step 2: Convert to fraction form
    315,634.38/435,575.43 = 172,394.76/x
  3. Step 3: Cross multiply
    315,634.38x = 435,575.43 × 172,394.76
  4. Step 4: Simplify right side
    315,634.38x = 75,090,921,716.75
  5. Step 5: Solve for x
    x = 75,090,921,716.75/315,634.38
  6. Step 6: Final answer
    x = 237,904.76

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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.