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Finding the Fourth Proportional to 661,998.80, 992,220.60 and 306,261.38

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Solution

The fourth proportional to 661,998.80, 992,220.60 and 306,261.38 is: 459,032.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,998.80 : 992,220.60 = 306,261.38 : x
  2. Step 2: Convert to fraction form
    661,998.80/992,220.60 = 306,261.38/x
  3. Step 3: Cross multiply
    661,998.80x = 992,220.60 × 306,261.38
  4. Step 4: Simplify right side
    661,998.80x = 303,878,850,220.43
  5. Step 5: Solve for x
    x = 303,878,850,220.43/661,998.80
  6. Step 6: Final answer
    x = 459,032.33

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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.