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Finding the Fourth Proportional to 2,051.65, 3,077.76 and 664.66

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Solution

The fourth proportional to 2,051.65, 3,077.76 and 664.66 is: 997.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.65 : 3,077.76 = 664.66 : x
  2. Step 2: Convert to fraction form
    2,051.65/3,077.76 = 664.66/x
  3. Step 3: Cross multiply
    2,051.65x = 3,077.76 × 664.66
  4. Step 4: Simplify right side
    2,051.65x = 2,045,670.30
  5. Step 5: Solve for x
    x = 2,045,670.30/2,051.65
  6. Step 6: Final answer
    x = 997.08

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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.