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Finding the Fourth Proportional to 1,805.78, 2,708.64 and 710.46

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Solution

The fourth proportional to 1,805.78, 2,708.64 and 710.46 is: 1,065.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.78 : 2,708.64 = 710.46 : x
  2. Step 2: Convert to fraction form
    1,805.78/2,708.64 = 710.46/x
  3. Step 3: Cross multiply
    1,805.78x = 2,708.64 × 710.46
  4. Step 4: Simplify right side
    1,805.78x = 1,924,380.37
  5. Step 5: Solve for x
    x = 1,924,380.37/1,805.78
  6. Step 6: Final answer
    x = 1,065.68

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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.