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Finding the Fourth Proportional to 387,220.88, 534,376.77 and 217,458.65

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Solution

The fourth proportional to 387,220.88, 534,376.77 and 217,458.65 is: 300,099.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,220.88 : 534,376.77 = 217,458.65 : x
  2. Step 2: Convert to fraction form
    387,220.88/534,376.77 = 217,458.65/x
  3. Step 3: Cross multiply
    387,220.88x = 534,376.77 × 217,458.65
  4. Step 4: Simplify right side
    387,220.88x = 116,204,850,995.56
  5. Step 5: Solve for x
    x = 116,204,850,995.56/387,220.88
  6. Step 6: Final answer
    x = 300,099.65

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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.