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Finding the Fourth Proportional to 1,375,612.54, 1,898,404.59 and 763,765.38

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Solution

The fourth proportional to 1,375,612.54, 1,898,404.59 and 763,765.38 is: 1,054,029.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,612.54 : 1,898,404.59 = 763,765.38 : x
  2. Step 2: Convert to fraction form
    1,375,612.54/1,898,404.59 = 763,765.38/x
  3. Step 3: Cross multiply
    1,375,612.54x = 1,898,404.59 × 763,765.38
  4. Step 4: Simplify right side
    1,375,612.54x = 1,449,935,703,075.09
  5. Step 5: Solve for x
    x = 1,449,935,703,075.09/1,375,612.54
  6. Step 6: Final answer
    x = 1,054,029.14

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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.