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Finding the Fourth Proportional to 1,559.48, 2,152.14 and 860.84

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Solution

The fourth proportional to 1,559.48, 2,152.14 and 860.84 is: 1,187.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.48 : 2,152.14 = 860.84 : x
  2. Step 2: Convert to fraction form
    1,559.48/2,152.14 = 860.84/x
  3. Step 3: Cross multiply
    1,559.48x = 2,152.14 × 860.84
  4. Step 4: Simplify right side
    1,559.48x = 1,852,648.20
  5. Step 5: Solve for x
    x = 1,852,648.20/1,559.48
  6. Step 6: Final answer
    x = 1,187.99

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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.