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Finding the Fourth Proportional to 1,294,486.84, 1,786,453.14 and 721,531.72

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Solution

The fourth proportional to 1,294,486.84, 1,786,453.14 and 721,531.72 is: 995,747.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,486.84 : 1,786,453.14 = 721,531.72 : x
  2. Step 2: Convert to fraction form
    1,294,486.84/1,786,453.14 = 721,531.72/x
  3. Step 3: Cross multiply
    1,294,486.84x = 1,786,453.14 × 721,531.72
  4. Step 4: Simplify right side
    1,294,486.84x = 1,288,982,606,803.60
  5. Step 5: Solve for x
    x = 1,288,982,606,803.60/1,294,486.84
  6. Step 6: Final answer
    x = 995,747.94

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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.