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Finding the Fourth Proportional to 719.41, 1,079.54 and 673.85

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Solution

The fourth proportional to 719.41, 1,079.54 and 673.85 is: 1,011.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.41 : 1,079.54 = 673.85 : x
  2. Step 2: Convert to fraction form
    719.41/1,079.54 = 673.85/x
  3. Step 3: Cross multiply
    719.41x = 1,079.54 × 673.85
  4. Step 4: Simplify right side
    719.41x = 727,444.66
  5. Step 5: Solve for x
    x = 727,444.66/719.41
  6. Step 6: Final answer
    x = 1,011.17

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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.