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Finding the Fourth Proportional to 1,230.30, 1,697.96 and 699.34

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Solution

The fourth proportional to 1,230.30, 1,697.96 and 699.34 is: 965.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.30 : 1,697.96 = 699.34 : x
  2. Step 2: Convert to fraction form
    1,230.30/1,697.96 = 699.34/x
  3. Step 3: Cross multiply
    1,230.30x = 1,697.96 × 699.34
  4. Step 4: Simplify right side
    1,230.30x = 1,187,447.85
  5. Step 5: Solve for x
    x = 1,187,447.85/1,230.30
  6. Step 6: Final answer
    x = 965.17

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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.