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Finding the Fourth Proportional to 1,238,752.40, 1,858,128.60 and 1,108,844.60

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Solution

The fourth proportional to 1,238,752.40, 1,858,128.60 and 1,108,844.60 is: 1,663,266.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,752.40 : 1,858,128.60 = 1,108,844.60 : x
  2. Step 2: Convert to fraction form
    1,238,752.40/1,858,128.60 = 1,108,844.60/x
  3. Step 3: Cross multiply
    1,238,752.40x = 1,858,128.60 × 1,108,844.60
  4. Step 4: Simplify right side
    1,238,752.40x = 2,060,375,864,215.56
  5. Step 5: Solve for x
    x = 2,060,375,864,215.56/1,238,752.40
  6. Step 6: Final answer
    x = 1,663,266.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.