Home / 1,728.24-2,381.04-1,309.20

Finding the Fourth Proportional to 1,728.24, 2,381.04 and 1,309.20

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Solution

The fourth proportional to 1,728.24, 2,381.04 and 1,309.20 is: 1,803.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.24 : 2,381.04 = 1,309.20 : x
  2. Step 2: Convert to fraction form
    1,728.24/2,381.04 = 1,309.20/x
  3. Step 3: Cross multiply
    1,728.24x = 2,381.04 × 1,309.20
  4. Step 4: Simplify right side
    1,728.24x = 3,117,257.57
  5. Step 5: Solve for x
    x = 3,117,257.57/1,728.24
  6. Step 6: Final answer
    x = 1,803.72

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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.