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Finding the Fourth Proportional to 663,639.80, 995,459.70 and 165,003.80

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Solution

The fourth proportional to 663,639.80, 995,459.70 and 165,003.80 is: 247,505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,639.80 : 995,459.70 = 165,003.80 : x
  2. Step 2: Convert to fraction form
    663,639.80/995,459.70 = 165,003.80/x
  3. Step 3: Cross multiply
    663,639.80x = 995,459.70 × 165,003.80
  4. Step 4: Simplify right side
    663,639.80x = 164,254,633,246.86
  5. Step 5: Solve for x
    x = 164,254,633,246.86/663,639.80
  6. Step 6: Final answer
    x = 247,505.70

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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.