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Finding the Fourth Proportional to 1,992,429.89, 2,749,530.36 and 1,121,261.22

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Solution

The fourth proportional to 1,992,429.89, 2,749,530.36 and 1,121,261.22 is: 1,547,327.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,429.89 : 2,749,530.36 = 1,121,261.22 : x
  2. Step 2: Convert to fraction form
    1,992,429.89/2,749,530.36 = 1,121,261.22/x
  3. Step 3: Cross multiply
    1,992,429.89x = 2,749,530.36 × 1,121,261.22
  4. Step 4: Simplify right side
    1,992,429.89x = 3,082,941,765,880.64
  5. Step 5: Solve for x
    x = 3,082,941,765,880.64/1,992,429.89
  6. Step 6: Final answer
    x = 1,547,327.61

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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.