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Finding the Fourth Proportional to 719.66, 1,079.22 and 354.36

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Solution

The fourth proportional to 719.66, 1,079.22 and 354.36 is: 531.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.66 : 1,079.22 = 354.36 : x
  2. Step 2: Convert to fraction form
    719.66/1,079.22 = 354.36/x
  3. Step 3: Cross multiply
    719.66x = 1,079.22 × 354.36
  4. Step 4: Simplify right side
    719.66x = 382,432.40
  5. Step 5: Solve for x
    x = 382,432.40/719.66
  6. Step 6: Final answer
    x = 531.41

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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.