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Finding the Fourth Proportional to 1,385,790, 1,912,395.96 and 749,886

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Solution

The fourth proportional to 1,385,790, 1,912,395.96 and 749,886 is: 1,034,845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,790 : 1,912,395.96 = 749,886 : x
  2. Step 2: Convert to fraction form
    1,385,790/1,912,395.96 = 749,886/x
  3. Step 3: Cross multiply
    1,385,790x = 1,912,395.96 × 749,886
  4. Step 4: Simplify right side
    1,385,790x = 1,434,078,956,860.56
  5. Step 5: Solve for x
    x = 1,434,078,956,860.56/1,385,790
  6. Step 6: Final answer
    x = 1,034,845.80

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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.