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Finding the Fourth Proportional to 3,066.72, 4,599.84 and 986.88

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Solution

The fourth proportional to 3,066.72, 4,599.84 and 986.88 is: 1,480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,066.72 : 4,599.84 = 986.88 : x
  2. Step 2: Convert to fraction form
    3,066.72/4,599.84 = 986.88/x
  3. Step 3: Cross multiply
    3,066.72x = 4,599.84 × 986.88
  4. Step 4: Simplify right side
    3,066.72x = 4,539,490.10
  5. Step 5: Solve for x
    x = 4,539,490.10/3,066.72
  6. Step 6: Final answer
    x = 1,480.24

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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.