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Finding the Fourth Proportional to 398,571.98, 550,016.46 and 217,281.02

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Solution

The fourth proportional to 398,571.98, 550,016.46 and 217,281.02 is: 299,840.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,571.98 : 550,016.46 = 217,281.02 : x
  2. Step 2: Convert to fraction form
    398,571.98/550,016.46 = 217,281.02/x
  3. Step 3: Cross multiply
    398,571.98x = 550,016.46 × 217,281.02
  4. Step 4: Simplify right side
    398,571.98x = 119,508,134,695.51
  5. Step 5: Solve for x
    x = 119,508,134,695.51/398,571.98
  6. Step 6: Final answer
    x = 299,840.79

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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.