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Finding the Fourth Proportional to 387,219.88, 534,375.39 and 217,457.65

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Solution

The fourth proportional to 387,219.88, 534,375.39 and 217,457.65 is: 300,098.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,219.88 : 534,375.39 = 217,457.65 : x
  2. Step 2: Convert to fraction form
    387,219.88/534,375.39 = 217,457.65/x
  3. Step 3: Cross multiply
    387,219.88x = 534,375.39 × 217,457.65
  4. Step 4: Simplify right side
    387,219.88x = 116,204,016,527.23
  5. Step 5: Solve for x
    x = 116,204,016,527.23/387,219.88
  6. Step 6: Final answer
    x = 300,098.27

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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.