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Finding the Fourth Proportional to 2,672.89, 4,008.19 and 918.07

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Solution

The fourth proportional to 2,672.89, 4,008.19 and 918.07 is: 1,376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.89 : 4,008.19 = 918.07 : x
  2. Step 2: Convert to fraction form
    2,672.89/4,008.19 = 918.07/x
  3. Step 3: Cross multiply
    2,672.89x = 4,008.19 × 918.07
  4. Step 4: Simplify right side
    2,672.89x = 3,679,811.31
  5. Step 5: Solve for x
    x = 3,679,811.31/2,672.89
  6. Step 6: Final answer
    x = 1,376.72

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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.