Home / 1,391.24-2,087.04-525.80

Finding the Fourth Proportional to 1,391.24, 2,087.04 and 525.80

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Solution

The fourth proportional to 1,391.24, 2,087.04 and 525.80 is: 788.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.24 : 2,087.04 = 525.80 : x
  2. Step 2: Convert to fraction form
    1,391.24/2,087.04 = 525.80/x
  3. Step 3: Cross multiply
    1,391.24x = 2,087.04 × 525.80
  4. Step 4: Simplify right side
    1,391.24x = 1,097,365.63
  5. Step 5: Solve for x
    x = 1,097,365.63/1,391.24
  6. Step 6: Final answer
    x = 788.77

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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.