Home / 1,559.20-2,151.58-860.58

Finding the Fourth Proportional to 1,559.20, 2,151.58 and 860.58

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Solution

The fourth proportional to 1,559.20, 2,151.58 and 860.58 is: 1,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.20 : 2,151.58 = 860.58 : x
  2. Step 2: Convert to fraction form
    1,559.20/2,151.58 = 860.58/x
  3. Step 3: Cross multiply
    1,559.20x = 2,151.58 × 860.58
  4. Step 4: Simplify right side
    1,559.20x = 1,851,606.72
  5. Step 5: Solve for x
    x = 1,851,606.72/1,559.20
  6. Step 6: Final answer
    x = 1,187.54

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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.