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Finding the Fourth Proportional to 2,753.19, 4,128.98 and 903.86

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Solution

The fourth proportional to 2,753.19, 4,128.98 and 903.86 is: 1,355.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.19 : 4,128.98 = 903.86 : x
  2. Step 2: Convert to fraction form
    2,753.19/4,128.98 = 903.86/x
  3. Step 3: Cross multiply
    2,753.19x = 4,128.98 × 903.86
  4. Step 4: Simplify right side
    2,753.19x = 3,732,010.18
  5. Step 5: Solve for x
    x = 3,732,010.18/2,753.19
  6. Step 6: Final answer
    x = 1,355.52

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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.