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Finding the Fourth Proportional to 1,342.79, 2,014.16 and 1,072.15

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Solution

The fourth proportional to 1,342.79, 2,014.16 and 1,072.15 is: 1,608.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.79 : 2,014.16 = 1,072.15 : x
  2. Step 2: Convert to fraction form
    1,342.79/2,014.16 = 1,072.15/x
  3. Step 3: Cross multiply
    1,342.79x = 2,014.16 × 1,072.15
  4. Step 4: Simplify right side
    1,342.79x = 2,159,479.29
  5. Step 5: Solve for x
    x = 2,159,479.29/1,342.79
  6. Step 6: Final answer
    x = 1,608.21

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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.