Home / 1,391.10-2,086.57-351.10

Finding the Fourth Proportional to 1,391.10, 2,086.57 and 351.10

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Solution

The fourth proportional to 1,391.10, 2,086.57 and 351.10 is: 526.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.10 : 2,086.57 = 351.10 : x
  2. Step 2: Convert to fraction form
    1,391.10/2,086.57 = 351.10/x
  3. Step 3: Cross multiply
    1,391.10x = 2,086.57 × 351.10
  4. Step 4: Simplify right side
    1,391.10x = 732,589.47
  5. Step 5: Solve for x
    x = 732,589.47/1,391.10
  6. Step 6: Final answer
    x = 526.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.