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Finding the Fourth Proportional to 217,803.12, 300,340.44 and 172,408.56

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Solution

The fourth proportional to 217,803.12, 300,340.44 and 172,408.56 is: 237,743.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,803.12 : 300,340.44 = 172,408.56 : x
  2. Step 2: Convert to fraction form
    217,803.12/300,340.44 = 172,408.56/x
  3. Step 3: Cross multiply
    217,803.12x = 300,340.44 × 172,408.56
  4. Step 4: Simplify right side
    217,803.12x = 51,781,262,770.17
  5. Step 5: Solve for x
    x = 51,781,262,770.17/217,803.12
  6. Step 6: Final answer
    x = 237,743.44

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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.