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Finding the Fourth Proportional to 1,230.91, 1,846.38 and 409.18

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Solution

The fourth proportional to 1,230.91, 1,846.38 and 409.18 is: 613.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.91 : 1,846.38 = 409.18 : x
  2. Step 2: Convert to fraction form
    1,230.91/1,846.38 = 409.18/x
  3. Step 3: Cross multiply
    1,230.91x = 1,846.38 × 409.18
  4. Step 4: Simplify right side
    1,230.91x = 755,501.77
  5. Step 5: Solve for x
    x = 755,501.77/1,230.91
  6. Step 6: Final answer
    x = 613.77

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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.