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Finding the Fourth Proportional to 671,998.80, 1,007,998.20 and 656,446.80

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Solution

The fourth proportional to 671,998.80, 1,007,998.20 and 656,446.80 is: 984,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,998.80 : 1,007,998.20 = 656,446.80 : x
  2. Step 2: Convert to fraction form
    671,998.80/1,007,998.20 = 656,446.80/x
  3. Step 3: Cross multiply
    671,998.80x = 1,007,998.20 × 656,446.80
  4. Step 4: Simplify right side
    671,998.80x = 661,697,192,795.76
  5. Step 5: Solve for x
    x = 661,697,192,795.76/671,998.80
  6. Step 6: Final answer
    x = 984,670.20

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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.