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Finding the Fourth Proportional to 457,246.20, 685,869.30 and 279,953.40

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Solution

The fourth proportional to 457,246.20, 685,869.30 and 279,953.40 is: 419,930.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,246.20 : 685,869.30 = 279,953.40 : x
  2. Step 2: Convert to fraction form
    457,246.20/685,869.30 = 279,953.40/x
  3. Step 3: Cross multiply
    457,246.20x = 685,869.30 × 279,953.40
  4. Step 4: Simplify right side
    457,246.20x = 192,011,442,490.62
  5. Step 5: Solve for x
    x = 192,011,442,490.62/457,246.20
  6. Step 6: Final answer
    x = 419,930.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.