Home / 2,390.20-3,298.38-1,342.28

Finding the Fourth Proportional to 2,390.20, 3,298.38 and 1,342.28

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Solution

The fourth proportional to 2,390.20, 3,298.38 and 1,342.28 is: 1,852.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.20 : 3,298.38 = 1,342.28 : x
  2. Step 2: Convert to fraction form
    2,390.20/3,298.38 = 1,342.28/x
  3. Step 3: Cross multiply
    2,390.20x = 3,298.38 × 1,342.28
  4. Step 4: Simplify right side
    2,390.20x = 4,427,349.51
  5. Step 5: Solve for x
    x = 4,427,349.51/2,390.20
  6. Step 6: Final answer
    x = 1,852.29

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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.