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Finding the Fourth Proportional to 2,283.78, 3,425.70 and 640.30

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Solution

The fourth proportional to 2,283.78, 3,425.70 and 640.30 is: 960.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,283.78 : 3,425.70 = 640.30 : x
  2. Step 2: Convert to fraction form
    2,283.78/3,425.70 = 640.30/x
  3. Step 3: Cross multiply
    2,283.78x = 3,425.70 × 640.30
  4. Step 4: Simplify right side
    2,283.78x = 2,193,475.71
  5. Step 5: Solve for x
    x = 2,193,475.71/2,283.78
  6. Step 6: Final answer
    x = 960.46

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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.