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Finding the Fourth Proportional to 398,870.40, 550,453.44 and 229,138.56

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Solution

The fourth proportional to 398,870.40, 550,453.44 and 229,138.56 is: 316,218.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,870.40 : 550,453.44 = 229,138.56 : x
  2. Step 2: Convert to fraction form
    398,870.40/550,453.44 = 229,138.56/x
  3. Step 3: Cross multiply
    398,870.40x = 550,453.44 × 229,138.56
  4. Step 4: Simplify right side
    398,870.40x = 126,130,108,588.65
  5. Step 5: Solve for x
    x = 126,130,108,588.65/398,870.40
  6. Step 6: Final answer
    x = 316,218.27

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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.