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Finding the Fourth Proportional to 663,513.75, 995,270.64 and 220,281.75

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Solution

The fourth proportional to 663,513.75, 995,270.64 and 220,281.75 is: 330,422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,513.75 : 995,270.64 = 220,281.75 : x
  2. Step 2: Convert to fraction form
    663,513.75/995,270.64 = 220,281.75/x
  3. Step 3: Cross multiply
    663,513.75x = 995,270.64 × 220,281.75
  4. Step 4: Simplify right side
    663,513.75x = 219,239,958,302.82
  5. Step 5: Solve for x
    x = 219,239,958,302.82/663,513.75
  6. Step 6: Final answer
    x = 330,422.63

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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.