Home / 1,813.12-2,498.68-1,288.24

Finding the Fourth Proportional to 1,813.12, 2,498.68 and 1,288.24

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Solution

The fourth proportional to 1,813.12, 2,498.68 and 1,288.24 is: 1,775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.12 : 2,498.68 = 1,288.24 : x
  2. Step 2: Convert to fraction form
    1,813.12/2,498.68 = 1,288.24/x
  3. Step 3: Cross multiply
    1,813.12x = 2,498.68 × 1,288.24
  4. Step 4: Simplify right side
    1,813.12x = 3,218,899.52
  5. Step 5: Solve for x
    x = 3,218,899.52/1,813.12
  6. Step 6: Final answer
    x = 1,775.34

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1.5x scale

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.