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Finding the Fourth Proportional to 930,940.80, 1,396,411.20 and 399,499.80

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Solution

The fourth proportional to 930,940.80, 1,396,411.20 and 399,499.80 is: 599,249.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    930,940.80 : 1,396,411.20 = 399,499.80 : x
  2. Step 2: Convert to fraction form
    930,940.80/1,396,411.20 = 399,499.80/x
  3. Step 3: Cross multiply
    930,940.80x = 1,396,411.20 × 399,499.80
  4. Step 4: Simplify right side
    930,940.80x = 557,865,995,117.76
  5. Step 5: Solve for x
    x = 557,865,995,117.76/930,940.80
  6. Step 6: Final answer
    x = 599,249.70

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Half scale
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Double scale
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Similar ratio
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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.