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Finding the Fourth Proportional to 668,891.91, 1,003,491.12 and 289,876.27

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Solution

The fourth proportional to 668,891.91, 1,003,491.12 and 289,876.27 is: 434,880.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,891.91 : 1,003,491.12 = 289,876.27 : x
  2. Step 2: Convert to fraction form
    668,891.91/1,003,491.12 = 289,876.27/x
  3. Step 3: Cross multiply
    668,891.91x = 1,003,491.12 × 289,876.27
  4. Step 4: Simplify right side
    668,891.91x = 290,888,257,826.27
  5. Step 5: Solve for x
    x = 290,888,257,826.27/668,891.91
  6. Step 6: Final answer
    x = 434,880.82

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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.