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Finding the Fourth Proportional to 315,793.68, 435,790.10 and 172,550.64

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Solution

The fourth proportional to 315,793.68, 435,790.10 and 172,550.64 is: 238,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,793.68 : 435,790.10 = 172,550.64 : x
  2. Step 2: Convert to fraction form
    315,793.68/435,790.10 = 172,550.64/x
  3. Step 3: Cross multiply
    315,793.68x = 435,790.10 × 172,550.64
  4. Step 4: Simplify right side
    315,793.68x = 75,195,860,660.66
  5. Step 5: Solve for x
    x = 75,195,860,660.66/315,793.68
  6. Step 6: Final answer
    x = 238,117.05

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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.