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Finding the Fourth Proportional to 398,767.91, 550,304.01 and 217,478.39

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Solution

The fourth proportional to 398,767.91, 550,304.01 and 217,478.39 is: 300,122.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,767.91 : 550,304.01 = 217,478.39 : x
  2. Step 2: Convert to fraction form
    398,767.91/550,304.01 = 217,478.39/x
  3. Step 3: Cross multiply
    398,767.91x = 550,304.01 × 217,478.39
  4. Step 4: Simplify right side
    398,767.91x = 119,679,227,353.82
  5. Step 5: Solve for x
    x = 119,679,227,353.82/398,767.91
  6. Step 6: Final answer
    x = 300,122.52

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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.