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Finding the Fourth Proportional to 2,940.18, 4,407.44 and 991.32

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Solution

The fourth proportional to 2,940.18, 4,407.44 and 991.32 is: 1,486.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.18 : 4,407.44 = 991.32 : x
  2. Step 2: Convert to fraction form
    2,940.18/4,407.44 = 991.32/x
  3. Step 3: Cross multiply
    2,940.18x = 4,407.44 × 991.32
  4. Step 4: Simplify right side
    2,940.18x = 4,369,178.46
  5. Step 5: Solve for x
    x = 4,369,178.46/2,940.18
  6. Step 6: Final answer
    x = 1,486.02

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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.