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Finding the Fourth Proportional to 315,652.86, 435,581.55 and 172,383.84

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Solution

The fourth proportional to 315,652.86, 435,581.55 and 172,383.84 is: 237,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,652.86 : 435,581.55 = 172,383.84 : x
  2. Step 2: Convert to fraction form
    315,652.86/435,581.55 = 172,383.84/x
  3. Step 3: Cross multiply
    315,652.86x = 435,581.55 × 172,383.84
  4. Step 4: Simplify right side
    315,652.86x = 75,087,220,222.15
  5. Step 5: Solve for x
    x = 75,087,220,222.15/315,652.86
  6. Step 6: Final answer
    x = 237,879.11

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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.