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Finding the Fourth Proportional to 1,987,063.78, 2,741,991.68 and 1,127,624.03

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Solution

The fourth proportional to 1,987,063.78, 2,741,991.68 and 1,127,624.03 is: 1,556,032.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,063.78 : 2,741,991.68 = 1,127,624.03 : x
  2. Step 2: Convert to fraction form
    1,987,063.78/2,741,991.68 = 1,127,624.03/x
  3. Step 3: Cross multiply
    1,987,063.78x = 2,741,991.68 × 1,127,624.03
  4. Step 4: Simplify right side
    1,987,063.78x = 3,091,935,723,243.34
  5. Step 5: Solve for x
    x = 3,091,935,723,243.34/1,987,063.78
  6. Step 6: Final answer
    x = 1,556,032.45

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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.