Home / 2,390.20-3,298.66-1,395.78

Finding the Fourth Proportional to 2,390.20, 3,298.66 and 1,395.78

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Solution

The fourth proportional to 2,390.20, 3,298.66 and 1,395.78 is: 1,926.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.20 : 3,298.66 = 1,395.78 : x
  2. Step 2: Convert to fraction form
    2,390.20/3,298.66 = 1,395.78/x
  3. Step 3: Cross multiply
    2,390.20x = 3,298.66 × 1,395.78
  4. Step 4: Simplify right side
    2,390.20x = 4,604,203.65
  5. Step 5: Solve for x
    x = 4,604,203.65/2,390.20
  6. Step 6: Final answer
    x = 1,926.28

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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.