Home / 2,390.40-3,298.18-1,395.11

Finding the Fourth Proportional to 2,390.40, 3,298.18 and 1,395.11

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Solution

The fourth proportional to 2,390.40, 3,298.18 and 1,395.11 is: 1,924.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.40 : 3,298.18 = 1,395.11 : x
  2. Step 2: Convert to fraction form
    2,390.40/3,298.18 = 1,395.11/x
  3. Step 3: Cross multiply
    2,390.40x = 3,298.18 × 1,395.11
  4. Step 4: Simplify right side
    2,390.40x = 4,601,323.90
  5. Step 5: Solve for x
    x = 4,601,323.90/2,390.40
  6. Step 6: Final answer
    x = 1,924.92

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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.