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Finding the Fourth Proportional to 3,978.52, 5,490.66 and 2,210.44

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Solution

The fourth proportional to 3,978.52, 5,490.66 and 2,210.44 is: 3,050.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.52 : 5,490.66 = 2,210.44 : x
  2. Step 2: Convert to fraction form
    3,978.52/5,490.66 = 2,210.44/x
  3. Step 3: Cross multiply
    3,978.52x = 5,490.66 × 2,210.44
  4. Step 4: Simplify right side
    3,978.52x = 12,136,774.49
  5. Step 5: Solve for x
    x = 12,136,774.49/3,978.52
  6. Step 6: Final answer
    x = 3,050.58

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1.5x scale

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.