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Finding the Fourth Proportional to 398,897.40, 550,490.70 and 229,165.56

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Solution

The fourth proportional to 398,897.40, 550,490.70 and 229,165.56 is: 316,255.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,897.40 : 550,490.70 = 229,165.56 : x
  2. Step 2: Convert to fraction form
    398,897.40/550,490.70 = 229,165.56/x
  3. Step 3: Cross multiply
    398,897.40x = 550,490.70 × 229,165.56
  4. Step 4: Simplify right side
    398,897.40x = 126,153,509,540.29
  5. Step 5: Solve for x
    x = 126,153,509,540.29/398,897.40
  6. Step 6: Final answer
    x = 316,255.53

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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.