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Finding the Fourth Proportional to 1,333,328.46, 1,839,979.80 and 721,467.78

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Solution

The fourth proportional to 1,333,328.46, 1,839,979.80 and 721,467.78 is: 995,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333,328.46 : 1,839,979.80 = 721,467.78 : x
  2. Step 2: Convert to fraction form
    1,333,328.46/1,839,979.80 = 721,467.78/x
  3. Step 3: Cross multiply
    1,333,328.46x = 1,839,979.80 × 721,467.78
  4. Step 4: Simplify right side
    1,333,328.46x = 1,327,486,141,550.84
  5. Step 5: Solve for x
    x = 1,327,486,141,550.84/1,333,328.46
  6. Step 6: Final answer
    x = 995,618.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.