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Finding the Fourth Proportional to 4,899.88, 7,349.82 and 1,978.21

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Solution

The fourth proportional to 4,899.88, 7,349.82 and 1,978.21 is: 2,967.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,899.88 : 7,349.82 = 1,978.21 : x
  2. Step 2: Convert to fraction form
    4,899.88/7,349.82 = 1,978.21/x
  3. Step 3: Cross multiply
    4,899.88x = 7,349.82 × 1,978.21
  4. Step 4: Simplify right side
    4,899.88x = 14,539,487.42
  5. Step 5: Solve for x
    x = 14,539,487.42/4,899.88
  6. Step 6: Final answer
    x = 2,967.32

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Similar ratio
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1.5x scale

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.