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Finding the Fourth Proportional to 1,034, 1,425.22 and 719.72

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Solution

The fourth proportional to 1,034, 1,425.22 and 719.72 is: 992.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034 : 1,425.22 = 719.72 : x
  2. Step 2: Convert to fraction form
    1,034/1,425.22 = 719.72/x
  3. Step 3: Cross multiply
    1,034x = 1,425.22 × 719.72
  4. Step 4: Simplify right side
    1,034x = 1,025,759.34
  5. Step 5: Solve for x
    x = 1,025,759.34/1,034
  6. Step 6: Final answer
    x = 992.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.