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Finding the Fourth Proportional to 1,504.64, 2,258.10 and 639.56

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Solution

The fourth proportional to 1,504.64, 2,258.10 and 639.56 is: 959.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,504.64 : 2,258.10 = 639.56 : x
  2. Step 2: Convert to fraction form
    1,504.64/2,258.10 = 639.56/x
  3. Step 3: Cross multiply
    1,504.64x = 2,258.10 × 639.56
  4. Step 4: Simplify right side
    1,504.64x = 1,444,190.44
  5. Step 5: Solve for x
    x = 1,444,190.44/1,504.64
  6. Step 6: Final answer
    x = 959.82

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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.