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Finding the Fourth Proportional to 693.20, 1,039.02 and 346.10

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Solution

The fourth proportional to 693.20, 1,039.02 and 346.10 is: 518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.20 : 1,039.02 = 346.10 : x
  2. Step 2: Convert to fraction form
    693.20/1,039.02 = 346.10/x
  3. Step 3: Cross multiply
    693.20x = 1,039.02 × 346.10
  4. Step 4: Simplify right side
    693.20x = 359,604.82
  5. Step 5: Solve for x
    x = 359,604.82/693.20
  6. Step 6: Final answer
    x = 518.76

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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.