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Finding the Fourth Proportional to 2,939.00, 4,405.66 and 990.14

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Solution

The fourth proportional to 2,939.00, 4,405.66 and 990.14 is: 1,484.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.00 : 4,405.66 = 990.14 : x
  2. Step 2: Convert to fraction form
    2,939.00/4,405.66 = 990.14/x
  3. Step 3: Cross multiply
    2,939.00x = 4,405.66 × 990.14
  4. Step 4: Simplify right side
    2,939.00x = 4,362,210.86
  5. Step 5: Solve for x
    x = 4,362,210.86/2,939.00
  6. Step 6: Final answer
    x = 1,484.25

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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.