Home / 1,921.17-2,651.30-1,135.22

Finding the Fourth Proportional to 1,921.17, 2,651.30 and 1,135.22

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Solution

The fourth proportional to 1,921.17, 2,651.30 and 1,135.22 is: 1,566.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.17 : 2,651.30 = 1,135.22 : x
  2. Step 2: Convert to fraction form
    1,921.17/2,651.30 = 1,135.22/x
  3. Step 3: Cross multiply
    1,921.17x = 2,651.30 × 1,135.22
  4. Step 4: Simplify right side
    1,921.17x = 3,009,808.79
  5. Step 5: Solve for x
    x = 3,009,808.79/1,921.17
  6. Step 6: Final answer
    x = 1,566.65

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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.