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Finding the Fourth Proportional to 1,333,281.29, 1,839,914.88 and 721,420.66

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Solution

The fourth proportional to 1,333,281.29, 1,839,914.88 and 721,420.66 is: 995,553.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333,281.29 : 1,839,914.88 = 721,420.66 : x
  2. Step 2: Convert to fraction form
    1,333,281.29/1,839,914.88 = 721,420.66/x
  3. Step 3: Cross multiply
    1,333,281.29x = 1,839,914.88 × 721,420.66
  4. Step 4: Simplify right side
    1,333,281.29x = 1,327,352,597,873.85
  5. Step 5: Solve for x
    x = 1,327,352,597,873.85/1,333,281.29
  6. Step 6: Final answer
    x = 995,553.31

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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.