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Finding the Fourth Proportional to 315,991.35, 436,065.12 and 172,750.95

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Solution

The fourth proportional to 315,991.35, 436,065.12 and 172,750.95 is: 238,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,991.35 : 436,065.12 = 172,750.95 : x
  2. Step 2: Convert to fraction form
    315,991.35/436,065.12 = 172,750.95/x
  3. Step 3: Cross multiply
    315,991.35x = 436,065.12 × 172,750.95
  4. Step 4: Simplify right side
    315,991.35x = 75,330,663,741.86
  5. Step 5: Solve for x
    x = 75,330,663,741.86/315,991.35
  6. Step 6: Final answer
    x = 238,394.70

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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.