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Finding the Fourth Proportional to 455,767.75, 628,972.20 and 251,831.80

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Solution

The fourth proportional to 455,767.75, 628,972.20 and 251,831.80 is: 347,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,767.75 : 628,972.20 = 251,831.80 : x
  2. Step 2: Convert to fraction form
    455,767.75/628,972.20 = 251,831.80/x
  3. Step 3: Cross multiply
    455,767.75x = 628,972.20 × 251,831.80
  4. Step 4: Simplify right side
    455,767.75x = 158,395,201,275.96
  5. Step 5: Solve for x
    x = 158,395,201,275.96/455,767.75
  6. Step 6: Final answer
    x = 347,534.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.