Home / 1,278,115.72-1,761,659.61-1,122,669.23

Finding the Fourth Proportional to 1,278,115.72, 1,761,659.61 and 1,122,669.23

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Solution

The fourth proportional to 1,278,115.72, 1,761,659.61 and 1,122,669.23 is: 1,547,403.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,115.72 : 1,761,659.61 = 1,122,669.23 : x
  2. Step 2: Convert to fraction form
    1,278,115.72/1,761,659.61 = 1,122,669.23/x
  3. Step 3: Cross multiply
    1,278,115.72x = 1,761,659.61 × 1,122,669.23
  4. Step 4: Simplify right side
    1,278,115.72x = 1,977,761,037,929.34
  5. Step 5: Solve for x
    x = 1,977,761,037,929.34/1,278,115.72
  6. Step 6: Final answer
    x = 1,547,403.73

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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.