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Finding the Fourth Proportional to 315,872.76, 435,903.38 and 172,632.76

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Solution

The fourth proportional to 315,872.76, 435,903.38 and 172,632.76 is: 238,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,872.76 : 435,903.38 = 172,632.76 : x
  2. Step 2: Convert to fraction form
    315,872.76/435,903.38 = 172,632.76/x
  3. Step 3: Cross multiply
    315,872.76x = 435,903.38 × 172,632.76
  4. Step 4: Simplify right side
    315,872.76x = 75,251,203,582.73
  5. Step 5: Solve for x
    x = 75,251,203,582.73/315,872.76
  6. Step 6: Final answer
    x = 238,232.65

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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.