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Finding the Fourth Proportional to 1,855.58, 2,560.74 and 1,109.40

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Solution

The fourth proportional to 1,855.58, 2,560.74 and 1,109.40 is: 1,531.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.58 : 2,560.74 = 1,109.40 : x
  2. Step 2: Convert to fraction form
    1,855.58/2,560.74 = 1,109.40/x
  3. Step 3: Cross multiply
    1,855.58x = 2,560.74 × 1,109.40
  4. Step 4: Simplify right side
    1,855.58x = 2,840,884.96
  5. Step 5: Solve for x
    x = 2,840,884.96/1,855.58
  6. Step 6: Final answer
    x = 1,531.00

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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.