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Finding the Fourth Proportional to 662,131.20, 993,196.80 and 620,659.20

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Solution

The fourth proportional to 662,131.20, 993,196.80 and 620,659.20 is: 930,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,131.20 : 993,196.80 = 620,659.20 : x
  2. Step 2: Convert to fraction form
    662,131.20/993,196.80 = 620,659.20/x
  3. Step 3: Cross multiply
    662,131.20x = 993,196.80 × 620,659.20
  4. Step 4: Simplify right side
    662,131.20x = 616,436,731,330.56
  5. Step 5: Solve for x
    x = 616,436,731,330.56/662,131.20
  6. Step 6: Final answer
    x = 930,988.80

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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.