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Finding the Fourth Proportional to 548,931.80, 823,916.10 and 338,979.80

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Solution

The fourth proportional to 548,931.80, 823,916.10 and 338,979.80 is: 508,789.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,931.80 : 823,916.10 = 338,979.80 : x
  2. Step 2: Convert to fraction form
    548,931.80/823,916.10 = 338,979.80/x
  3. Step 3: Cross multiply
    548,931.80x = 823,916.10 × 338,979.80
  4. Step 4: Simplify right side
    548,931.80x = 279,290,914,794.78
  5. Step 5: Solve for x
    x = 279,290,914,794.78/548,931.80
  6. Step 6: Final answer
    x = 508,789.83

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Double scale
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1.5x scale

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.