Home / 1,865.12-2,573.25-1,078.61

Finding the Fourth Proportional to 1,865.12, 2,573.25 and 1,078.61

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Solution

The fourth proportional to 1,865.12, 2,573.25 and 1,078.61 is: 1,488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.12 : 2,573.25 = 1,078.61 : x
  2. Step 2: Convert to fraction form
    1,865.12/2,573.25 = 1,078.61/x
  3. Step 3: Cross multiply
    1,865.12x = 2,573.25 × 1,078.61
  4. Step 4: Simplify right side
    1,865.12x = 2,775,533.18
  5. Step 5: Solve for x
    x = 2,775,533.18/1,865.12
  6. Step 6: Final answer
    x = 1,488.13

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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.