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Finding the Fourth Proportional to 1,368,057.65, 1,887,919.97 and 747,865.51

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Solution

The fourth proportional to 1,368,057.65, 1,887,919.97 and 747,865.51 is: 1,032,054.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,057.65 : 1,887,919.97 = 747,865.51 : x
  2. Step 2: Convert to fraction form
    1,368,057.65/1,887,919.97 = 747,865.51/x
  3. Step 3: Cross multiply
    1,368,057.65x = 1,887,919.97 × 747,865.51
  4. Step 4: Simplify right side
    1,368,057.65x = 1,411,910,222,744.11
  5. Step 5: Solve for x
    x = 1,411,910,222,744.11/1,368,057.65
  6. Step 6: Final answer
    x = 1,032,054.63

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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.