Home / 2,390.12-3,298.76-1,395.39

Finding the Fourth Proportional to 2,390.12, 3,298.76 and 1,395.39

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Solution

The fourth proportional to 2,390.12, 3,298.76 and 1,395.39 is: 1,925.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.12 : 3,298.76 = 1,395.39 : x
  2. Step 2: Convert to fraction form
    2,390.12/3,298.76 = 1,395.39/x
  3. Step 3: Cross multiply
    2,390.12x = 3,298.76 × 1,395.39
  4. Step 4: Simplify right side
    2,390.12x = 4,603,049.74
  5. Step 5: Solve for x
    x = 4,603,049.74/2,390.12
  6. Step 6: Final answer
    x = 1,925.87

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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.