Home / 2,389.40-3,298.26-2,140.28

Finding the Fourth Proportional to 2,389.40, 3,298.26 and 2,140.28

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Solution

The fourth proportional to 2,389.40, 3,298.26 and 2,140.28 is: 2,954.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.40 : 3,298.26 = 2,140.28 : x
  2. Step 2: Convert to fraction form
    2,389.40/3,298.26 = 2,140.28/x
  3. Step 3: Cross multiply
    2,389.40x = 3,298.26 × 2,140.28
  4. Step 4: Simplify right side
    2,389.40x = 7,059,199.91
  5. Step 5: Solve for x
    x = 7,059,199.91/2,389.40
  6. Step 6: Final answer
    x = 2,954.38

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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.