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Finding the Fourth Proportional to 1,361,486.56, 1,878,835.92 and 749,626.55

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Solution

The fourth proportional to 1,361,486.56, 1,878,835.92 and 749,626.55 is: 1,034,476.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361,486.56 : 1,878,835.92 = 749,626.55 : x
  2. Step 2: Convert to fraction form
    1,361,486.56/1,878,835.92 = 749,626.55/x
  3. Step 3: Cross multiply
    1,361,486.56x = 1,878,835.92 × 749,626.55
  4. Step 4: Simplify right side
    1,361,486.56x = 1,408,425,288,725.68
  5. Step 5: Solve for x
    x = 1,408,425,288,725.68/1,361,486.56
  6. Step 6: Final answer
    x = 1,034,476.09

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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.