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Finding the Fourth Proportional to 667,279.94, 920,846.80 and 361,358.72

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Solution

The fourth proportional to 667,279.94, 920,846.80 and 361,358.72 is: 498,675.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,279.94 : 920,846.80 = 361,358.72 : x
  2. Step 2: Convert to fraction form
    667,279.94/920,846.80 = 361,358.72/x
  3. Step 3: Cross multiply
    667,279.94x = 920,846.80 × 361,358.72
  4. Step 4: Simplify right side
    667,279.94x = 332,756,020,964.10
  5. Step 5: Solve for x
    x = 332,756,020,964.10/667,279.94
  6. Step 6: Final answer
    x = 498,675.30

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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.