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Finding the Fourth Proportional to 1,619,638.90, 2,235,101.68 and 940,619.14

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Solution

The fourth proportional to 1,619,638.90, 2,235,101.68 and 940,619.14 is: 1,298,054.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619,638.90 : 2,235,101.68 = 940,619.14 : x
  2. Step 2: Convert to fraction form
    1,619,638.90/2,235,101.68 = 940,619.14/x
  3. Step 3: Cross multiply
    1,619,638.90x = 2,235,101.68 × 940,619.14
  4. Step 4: Simplify right side
    1,619,638.90x = 2,102,379,420,054.16
  5. Step 5: Solve for x
    x = 2,102,379,420,054.16/1,619,638.90
  6. Step 6: Final answer
    x = 1,298,054.41

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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.