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Finding the Fourth Proportional to 1,559.08, 2,151.50 and 860.44

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Solution

The fourth proportional to 1,559.08, 2,151.50 and 860.44 is: 1,187.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.08 : 2,151.50 = 860.44 : x
  2. Step 2: Convert to fraction form
    1,559.08/2,151.50 = 860.44/x
  3. Step 3: Cross multiply
    1,559.08x = 2,151.50 × 860.44
  4. Step 4: Simplify right side
    1,559.08x = 1,851,236.66
  5. Step 5: Solve for x
    x = 1,851,236.66/1,559.08
  6. Step 6: Final answer
    x = 1,187.39

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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.