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Finding the Fourth Proportional to 893,105.40, 1,339,805.70 and 413,812.20

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Solution

The fourth proportional to 893,105.40, 1,339,805.70 and 413,812.20 is: 620,786.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,105.40 : 1,339,805.70 = 413,812.20 : x
  2. Step 2: Convert to fraction form
    893,105.40/1,339,805.70 = 413,812.20/x
  3. Step 3: Cross multiply
    893,105.40x = 1,339,805.70 × 413,812.20
  4. Step 4: Simplify right side
    893,105.40x = 554,427,944,289.54
  5. Step 5: Solve for x
    x = 554,427,944,289.54/893,105.40
  6. Step 6: Final answer
    x = 620,786.69

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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.