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Finding the Fourth Proportional to 1,857.58, 2,785.84 and 747.00

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Solution

The fourth proportional to 1,857.58, 2,785.84 and 747.00 is: 1,120.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.58 : 2,785.84 = 747.00 : x
  2. Step 2: Convert to fraction form
    1,857.58/2,785.84 = 747.00/x
  3. Step 3: Cross multiply
    1,857.58x = 2,785.84 × 747.00
  4. Step 4: Simplify right side
    1,857.58x = 2,081,016.98
  5. Step 5: Solve for x
    x = 2,081,016.98/1,857.58
  6. Step 6: Final answer
    x = 1,120.28

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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.