Home / 2,315.47-3,194.85-1,320.48

Finding the Fourth Proportional to 2,315.47, 3,194.85 and 1,320.48

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Solution

The fourth proportional to 2,315.47, 3,194.85 and 1,320.48 is: 1,821.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.47 : 3,194.85 = 1,320.48 : x
  2. Step 2: Convert to fraction form
    2,315.47/3,194.85 = 1,320.48/x
  3. Step 3: Cross multiply
    2,315.47x = 3,194.85 × 1,320.48
  4. Step 4: Simplify right side
    2,315.47x = 4,218,735.53
  5. Step 5: Solve for x
    x = 4,218,735.53/2,315.47
  6. Step 6: Final answer
    x = 1,821.98

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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.