Home / 1,284.30-1,921.65-1,169.10

Finding the Fourth Proportional to 1,284.30, 1,921.65 and 1,169.10

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Solution

The fourth proportional to 1,284.30, 1,921.65 and 1,169.10 is: 1,749.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.30 : 1,921.65 = 1,169.10 : x
  2. Step 2: Convert to fraction form
    1,284.30/1,921.65 = 1,169.10/x
  3. Step 3: Cross multiply
    1,284.30x = 1,921.65 × 1,169.10
  4. Step 4: Simplify right side
    1,284.30x = 2,246,601.02
  5. Step 5: Solve for x
    x = 2,246,601.02/1,284.30
  6. Step 6: Final answer
    x = 1,749.28

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1.5x scale

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.