Home / 1,986.26-2,979.45-525.56

Finding the Fourth Proportional to 1,986.26, 2,979.45 and 525.56

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Solution

The fourth proportional to 1,986.26, 2,979.45 and 525.56 is: 788.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.26 : 2,979.45 = 525.56 : x
  2. Step 2: Convert to fraction form
    1,986.26/2,979.45 = 525.56/x
  3. Step 3: Cross multiply
    1,986.26x = 2,979.45 × 525.56
  4. Step 4: Simplify right side
    1,986.26x = 1,565,864.84
  5. Step 5: Solve for x
    x = 1,565,864.84/1,986.26
  6. Step 6: Final answer
    x = 788.35

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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.