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Finding the Fourth Proportional to 1,777.25, 2,666.84 and 865.25

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Solution

The fourth proportional to 1,777.25, 2,666.84 and 865.25 is: 1,298.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.25 : 2,666.84 = 865.25 : x
  2. Step 2: Convert to fraction form
    1,777.25/2,666.84 = 865.25/x
  3. Step 3: Cross multiply
    1,777.25x = 2,666.84 × 865.25
  4. Step 4: Simplify right side
    1,777.25x = 2,307,478.98
  5. Step 5: Solve for x
    x = 2,307,478.98/1,777.25
  6. Step 6: Final answer
    x = 1,298.34

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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.