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Finding the Fourth Proportional to 2,807.94, 4,211.97 and 860.13

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Solution

The fourth proportional to 2,807.94, 4,211.97 and 860.13 is: 1,290.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.94 : 4,211.97 = 860.13 : x
  2. Step 2: Convert to fraction form
    2,807.94/4,211.97 = 860.13/x
  3. Step 3: Cross multiply
    2,807.94x = 4,211.97 × 860.13
  4. Step 4: Simplify right side
    2,807.94x = 3,622,841.76
  5. Step 5: Solve for x
    x = 3,622,841.76/2,807.94
  6. Step 6: Final answer
    x = 1,290.21

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1.5x scale

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.