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Finding the Fourth Proportional to 663,988,935.80, 995,983,403.70 and 434,665,364.60

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Solution

The fourth proportional to 663,988,935.80, 995,983,403.70 and 434,665,364.60 is: 651,998,046.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,988,935.80 : 995,983,403.70 = 434,665,364.60 : x
  2. Step 2: Convert to fraction form
    663,988,935.80/995,983,403.70 = 434,665,364.60/x
  3. Step 3: Cross multiply
    663,988,935.80x = 995,983,403.70 × 434,665,364.60
  4. Step 4: Simplify right side
    663,988,935.80x = 432,919,489,304,809,536
  5. Step 5: Solve for x
    x = 432,919,489,304,809,536/663,988,935.80
  6. Step 6: Final answer
    x = 651,998,046.90

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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.