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Finding the Fourth Proportional to 2,303.78, 3,455.64 and 917.44

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Solution

The fourth proportional to 2,303.78, 3,455.64 and 917.44 is: 1,376.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,303.78 : 3,455.64 = 917.44 : x
  2. Step 2: Convert to fraction form
    2,303.78/3,455.64 = 917.44/x
  3. Step 3: Cross multiply
    2,303.78x = 3,455.64 × 917.44
  4. Step 4: Simplify right side
    2,303.78x = 3,170,342.36
  5. Step 5: Solve for x
    x = 3,170,342.36/2,303.78
  6. Step 6: Final answer
    x = 1,376.15

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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.