Home / 2,390.78-3,299.40-1,343.18

Finding the Fourth Proportional to 2,390.78, 3,299.40 and 1,343.18

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Solution

The fourth proportional to 2,390.78, 3,299.40 and 1,343.18 is: 1,853.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.78 : 3,299.40 = 1,343.18 : x
  2. Step 2: Convert to fraction form
    2,390.78/3,299.40 = 1,343.18/x
  3. Step 3: Cross multiply
    2,390.78x = 3,299.40 × 1,343.18
  4. Step 4: Simplify right side
    2,390.78x = 4,431,688.09
  5. Step 5: Solve for x
    x = 4,431,688.09/2,390.78
  6. Step 6: Final answer
    x = 1,853.66

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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.