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Finding the Fourth Proportional to 663,690.40, 995,535.60 and 220,458.40

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Solution

The fourth proportional to 663,690.40, 995,535.60 and 220,458.40 is: 330,687.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,690.40 : 995,535.60 = 220,458.40 : x
  2. Step 2: Convert to fraction form
    663,690.40/995,535.60 = 220,458.40/x
  3. Step 3: Cross multiply
    663,690.40x = 995,535.60 × 220,458.40
  4. Step 4: Simplify right side
    663,690.40x = 219,474,185,519.04
  5. Step 5: Solve for x
    x = 219,474,185,519.04/663,690.40
  6. Step 6: Final answer
    x = 330,687.60

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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.