Home / 1,220.00-1,831.38-490.08

Finding the Fourth Proportional to 1,220.00, 1,831.38 and 490.08

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Solution

The fourth proportional to 1,220.00, 1,831.38 and 490.08 is: 735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.00 : 1,831.38 = 490.08 : x
  2. Step 2: Convert to fraction form
    1,220.00/1,831.38 = 490.08/x
  3. Step 3: Cross multiply
    1,220.00x = 1,831.38 × 490.08
  4. Step 4: Simplify right side
    1,220.00x = 897,527.74
  5. Step 5: Solve for x
    x = 897,527.74/1,220.00
  6. Step 6: Final answer
    x = 735.68

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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.