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Finding the Fourth Proportional to 1,220.49, 1,831.23 and 603.90

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Solution

The fourth proportional to 1,220.49, 1,831.23 and 603.90 is: 906.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.49 : 1,831.23 = 603.90 : x
  2. Step 2: Convert to fraction form
    1,220.49/1,831.23 = 603.90/x
  3. Step 3: Cross multiply
    1,220.49x = 1,831.23 × 603.90
  4. Step 4: Simplify right side
    1,220.49x = 1,105,879.80
  5. Step 5: Solve for x
    x = 1,105,879.80/1,220.49
  6. Step 6: Final answer
    x = 906.09

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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.