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Finding the Fourth Proportional to 2,752.58, 4,128 and 903.39

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Solution

The fourth proportional to 2,752.58, 4,128 and 903.39 is: 1,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,752.58 : 4,128 = 903.39 : x
  2. Step 2: Convert to fraction form
    2,752.58/4,128 = 903.39/x
  3. Step 3: Cross multiply
    2,752.58x = 4,128 × 903.39
  4. Step 4: Simplify right side
    2,752.58x = 3,729,193.92
  5. Step 5: Solve for x
    x = 3,729,193.92/2,752.58
  6. Step 6: Final answer
    x = 1,354.80

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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.