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Finding the Fourth Proportional to 1,895.20, 2,840.28 and 854.80

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Solution

The fourth proportional to 1,895.20, 2,840.28 and 854.80 is: 1,281.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,895.20 : 2,840.28 = 854.80 : x
  2. Step 2: Convert to fraction form
    1,895.20/2,840.28 = 854.80/x
  3. Step 3: Cross multiply
    1,895.20x = 2,840.28 × 854.80
  4. Step 4: Simplify right side
    1,895.20x = 2,427,871.34
  5. Step 5: Solve for x
    x = 2,427,871.34/1,895.20
  6. Step 6: Final answer
    x = 1,281.06

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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.