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Finding the Fourth Proportional to 664,210.80, 996,316.20 and 397,834.20

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Solution

The fourth proportional to 664,210.80, 996,316.20 and 397,834.20 is: 596,751.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,210.80 : 996,316.20 = 397,834.20 : x
  2. Step 2: Convert to fraction form
    664,210.80/996,316.20 = 397,834.20/x
  3. Step 3: Cross multiply
    664,210.80x = 996,316.20 × 397,834.20
  4. Step 4: Simplify right side
    664,210.80x = 396,368,658,374.04
  5. Step 5: Solve for x
    x = 396,368,658,374.04/664,210.80
  6. Step 6: Final answer
    x = 596,751.30

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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.