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Finding the Fourth Proportional to 2,303.66, 3,455.45 and 743.78

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Solution

The fourth proportional to 2,303.66, 3,455.45 and 743.78 is: 1,115.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,303.66 : 3,455.45 = 743.78 : x
  2. Step 2: Convert to fraction form
    2,303.66/3,455.45 = 743.78/x
  3. Step 3: Cross multiply
    2,303.66x = 3,455.45 × 743.78
  4. Step 4: Simplify right side
    2,303.66x = 2,570,102.31
  5. Step 5: Solve for x
    x = 2,570,102.31/2,303.66
  6. Step 6: Final answer
    x = 1,115.66

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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.