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Finding the Fourth Proportional to 398,644.78, 550,134.12 and 217,355.26

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Solution

The fourth proportional to 398,644.78, 550,134.12 and 217,355.26 is: 299,952.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,644.78 : 550,134.12 = 217,355.26 : x
  2. Step 2: Convert to fraction form
    398,644.78/550,134.12 = 217,355.26/x
  3. Step 3: Cross multiply
    398,644.78x = 550,134.12 × 217,355.26
  4. Step 4: Simplify right side
    398,644.78x = 119,574,544,687.47
  5. Step 5: Solve for x
    x = 119,574,544,687.47/398,644.78
  6. Step 6: Final answer
    x = 299,952.62

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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.