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Finding the Fourth Proportional to 2,365.78, 3,548.70 and 722.20

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Solution

The fourth proportional to 2,365.78, 3,548.70 and 722.20 is: 1,083.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,365.78 : 3,548.70 = 722.20 : x
  2. Step 2: Convert to fraction form
    2,365.78/3,548.70 = 722.20/x
  3. Step 3: Cross multiply
    2,365.78x = 3,548.70 × 722.20
  4. Step 4: Simplify right side
    2,365.78x = 2,562,871.14
  5. Step 5: Solve for x
    x = 2,562,871.14/2,365.78
  6. Step 6: Final answer
    x = 1,083.31

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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.