Home / 1,391.24-2,086.90-525.34

Finding the Fourth Proportional to 1,391.24, 2,086.90 and 525.34

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Solution

The fourth proportional to 1,391.24, 2,086.90 and 525.34 is: 788.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.24 : 2,086.90 = 525.34 : x
  2. Step 2: Convert to fraction form
    1,391.24/2,086.90 = 525.34/x
  3. Step 3: Cross multiply
    1,391.24x = 2,086.90 × 525.34
  4. Step 4: Simplify right side
    1,391.24x = 1,096,332.05
  5. Step 5: Solve for x
    x = 1,096,332.05/1,391.24
  6. Step 6: Final answer
    x = 788.03

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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.