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Finding the Fourth Proportional to 1,559.46, 2,152.08 and 860.84

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Solution

The fourth proportional to 1,559.46, 2,152.08 and 860.84 is: 1,187.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.46 : 2,152.08 = 860.84 : x
  2. Step 2: Convert to fraction form
    1,559.46/2,152.08 = 860.84/x
  3. Step 3: Cross multiply
    1,559.46x = 2,152.08 × 860.84
  4. Step 4: Simplify right side
    1,559.46x = 1,852,596.55
  5. Step 5: Solve for x
    x = 1,852,596.55/1,559.46
  6. Step 6: Final answer
    x = 1,187.97

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1.5x scale

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.