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Finding the Fourth Proportional to 1,361,480.81, 1,878,828.01 and 749,620.78

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Solution

The fourth proportional to 1,361,480.81, 1,878,828.01 and 749,620.78 is: 1,034,468.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361,480.81 : 1,878,828.01 = 749,620.78 : x
  2. Step 2: Convert to fraction form
    1,361,480.81/1,878,828.01 = 749,620.78/x
  3. Step 3: Cross multiply
    1,361,480.81x = 1,878,828.01 × 749,620.78
  4. Step 4: Simplify right side
    1,361,480.81x = 1,408,408,511,770.93
  5. Step 5: Solve for x
    x = 1,408,408,511,770.93/1,361,480.81
  6. Step 6: Final answer
    x = 1,034,468.14

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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.