Home / 281,919.06-420,831.95-261,105.30

Finding the Fourth Proportional to 281,919.06, 420,831.95 and 261,105.30

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Solution

The fourth proportional to 281,919.06, 420,831.95 and 261,105.30 is: 389,762.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,919.06 : 420,831.95 = 261,105.30 : x
  2. Step 2: Convert to fraction form
    281,919.06/420,831.95 = 261,105.30/x
  3. Step 3: Cross multiply
    281,919.06x = 420,831.95 × 261,105.30
  4. Step 4: Simplify right side
    281,919.06x = 109,881,451,248.81
  5. Step 5: Solve for x
    x = 109,881,451,248.81/281,919.06
  6. Step 6: Final answer
    x = 389,762.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.