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Finding the Fourth Proportional to 3,572.03, 4,929.28 and 1,978.61

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Solution

The fourth proportional to 3,572.03, 4,929.28 and 1,978.61 is: 2,730.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.03 : 4,929.28 = 1,978.61 : x
  2. Step 2: Convert to fraction form
    3,572.03/4,929.28 = 1,978.61/x
  3. Step 3: Cross multiply
    3,572.03x = 4,929.28 × 1,978.61
  4. Step 4: Simplify right side
    3,572.03x = 9,753,110.38
  5. Step 5: Solve for x
    x = 9,753,110.38/3,572.03
  6. Step 6: Final answer
    x = 2,730.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.