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Finding the Fourth Proportional to 1,504.84, 2,256 and 639.76

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Solution

The fourth proportional to 1,504.84, 2,256 and 639.76 is: 959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,504.84 : 2,256 = 639.76 : x
  2. Step 2: Convert to fraction form
    1,504.84/2,256 = 639.76/x
  3. Step 3: Cross multiply
    1,504.84x = 2,256 × 639.76
  4. Step 4: Simplify right side
    1,504.84x = 1,443,298.56
  5. Step 5: Solve for x
    x = 1,443,298.56/1,504.84
  6. Step 6: Final answer
    x = 959.10

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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.