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Finding the Fourth Proportional to 663,670.60, 995,505.90 and 220,438.60

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Solution

The fourth proportional to 663,670.60, 995,505.90 and 220,438.60 is: 330,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,670.60 : 995,505.90 = 220,438.60 : x
  2. Step 2: Convert to fraction form
    663,670.60/995,505.90 = 220,438.60/x
  3. Step 3: Cross multiply
    663,670.60x = 995,505.90 × 220,438.60
  4. Step 4: Simplify right side
    663,670.60x = 219,447,926,887.74
  5. Step 5: Solve for x
    x = 219,447,926,887.74/663,670.60
  6. Step 6: Final answer
    x = 330,657.90

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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.