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Finding the Fourth Proportional to 398,885.46, 550,665 and 308,037.48

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Solution

The fourth proportional to 398,885.46, 550,665 and 308,037.48 is: 425,248.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,885.46 : 550,665 = 308,037.48 : x
  2. Step 2: Convert to fraction form
    398,885.46/550,665 = 308,037.48/x
  3. Step 3: Cross multiply
    398,885.46x = 550,665 × 308,037.48
  4. Step 4: Simplify right side
    398,885.46x = 169,625,458,924.20
  5. Step 5: Solve for x
    x = 169,625,458,924.20/398,885.46
  6. Step 6: Final answer
    x = 425,248.54

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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.