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Finding the Fourth Proportional to 1,852.59, 2,778.44 and 864.78

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Solution

The fourth proportional to 1,852.59, 2,778.44 and 864.78 is: 1,296.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.59 : 2,778.44 = 864.78 : x
  2. Step 2: Convert to fraction form
    1,852.59/2,778.44 = 864.78/x
  3. Step 3: Cross multiply
    1,852.59x = 2,778.44 × 864.78
  4. Step 4: Simplify right side
    1,852.59x = 2,402,735.02
  5. Step 5: Solve for x
    x = 2,402,735.02/1,852.59
  6. Step 6: Final answer
    x = 1,296.96

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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.