Home / 2,122.29-2,929.10-1,190.79

Finding the Fourth Proportional to 2,122.29, 2,929.10 and 1,190.79

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Solution

The fourth proportional to 2,122.29, 2,929.10 and 1,190.79 is: 1,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.29 : 2,929.10 = 1,190.79 : x
  2. Step 2: Convert to fraction form
    2,122.29/2,929.10 = 1,190.79/x
  3. Step 3: Cross multiply
    2,122.29x = 2,929.10 × 1,190.79
  4. Step 4: Simplify right side
    2,122.29x = 3,487,937.04
  5. Step 5: Solve for x
    x = 3,487,937.04/2,122.29
  6. Step 6: Final answer
    x = 1,643.48

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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.