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Finding the Fourth Proportional to 315,752.68, 435,738.18 and 172,512.69

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Solution

The fourth proportional to 315,752.68, 435,738.18 and 172,512.69 is: 238,067.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,752.68 : 435,738.18 = 172,512.69 : x
  2. Step 2: Convert to fraction form
    315,752.68/435,738.18 = 172,512.69/x
  3. Step 3: Cross multiply
    315,752.68x = 435,738.18 × 172,512.69
  4. Step 4: Simplify right side
    315,752.68x = 75,170,365,567.50
  5. Step 5: Solve for x
    x = 75,170,365,567.50/315,752.68
  6. Step 6: Final answer
    x = 238,067.23

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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.