Home / 1,865.15-2,798.53-1,288.97

Finding the Fourth Proportional to 1,865.15, 2,798.53 and 1,288.97

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Solution

The fourth proportional to 1,865.15, 2,798.53 and 1,288.97 is: 1,934.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.15 : 2,798.53 = 1,288.97 : x
  2. Step 2: Convert to fraction form
    1,865.15/2,798.53 = 1,288.97/x
  3. Step 3: Cross multiply
    1,865.15x = 2,798.53 × 1,288.97
  4. Step 4: Simplify right side
    1,865.15x = 3,607,221.21
  5. Step 5: Solve for x
    x = 3,607,221.21/1,865.15
  6. Step 6: Final answer
    x = 1,934.01

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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.