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Finding the Fourth Proportional to 485,424.27, 669,889.94 and 267,640.76

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Solution

The fourth proportional to 485,424.27, 669,889.94 and 267,640.76 is: 369,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,424.27 : 669,889.94 = 267,640.76 : x
  2. Step 2: Convert to fraction form
    485,424.27/669,889.94 = 267,640.76/x
  3. Step 3: Cross multiply
    485,424.27x = 669,889.94 × 267,640.76
  4. Step 4: Simplify right side
    485,424.27x = 179,289,855,756.00
  5. Step 5: Solve for x
    x = 179,289,855,756.00/485,424.27
  6. Step 6: Final answer
    x = 369,346.70

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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.