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Finding the Fourth Proportional to 838,071.84, 1,256,403.60 and 679,908

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Solution

The fourth proportional to 838,071.84, 1,256,403.60 and 679,908 is: 1,019,290.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,071.84 : 1,256,403.60 = 679,908 : x
  2. Step 2: Convert to fraction form
    838,071.84/1,256,403.60 = 679,908/x
  3. Step 3: Cross multiply
    838,071.84x = 1,256,403.60 × 679,908
  4. Step 4: Simplify right side
    838,071.84x = 854,238,858,868.80
  5. Step 5: Solve for x
    x = 854,238,858,868.80/838,071.84
  6. Step 6: Final answer
    x = 1,019,290.73

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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.