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Finding the Fourth Proportional to 719.08, 1,079.02 and 353.92

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Solution

The fourth proportional to 719.08, 1,079.02 and 353.92 is: 531.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.08 : 1,079.02 = 353.92 : x
  2. Step 2: Convert to fraction form
    719.08/1,079.02 = 353.92/x
  3. Step 3: Cross multiply
    719.08x = 1,079.02 × 353.92
  4. Step 4: Simplify right side
    719.08x = 381,886.76
  5. Step 5: Solve for x
    x = 381,886.76/719.08
  6. Step 6: Final answer
    x = 531.08

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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.