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Finding the Fourth Proportional to 1,230.87, 1,843.47 and 612.66

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Solution

The fourth proportional to 1,230.87, 1,843.47 and 612.66 is: 917.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.87 : 1,843.47 = 612.66 : x
  2. Step 2: Convert to fraction form
    1,230.87/1,843.47 = 612.66/x
  3. Step 3: Cross multiply
    1,230.87x = 1,843.47 × 612.66
  4. Step 4: Simplify right side
    1,230.87x = 1,129,420.33
  5. Step 5: Solve for x
    x = 1,129,420.33/1,230.87
  6. Step 6: Final answer
    x = 917.58

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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.