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Finding the Fourth Proportional to 455,220.84, 628,204.78 and 251,271.80

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Solution

The fourth proportional to 455,220.84, 628,204.78 and 251,271.80 is: 346,755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,220.84 : 628,204.78 = 251,271.80 : x
  2. Step 2: Convert to fraction form
    455,220.84/628,204.78 = 251,271.80/x
  3. Step 3: Cross multiply
    455,220.84x = 628,204.78 × 251,271.80
  4. Step 4: Simplify right side
    455,220.84x = 157,850,145,839.20
  5. Step 5: Solve for x
    x = 157,850,145,839.20/455,220.84
  6. Step 6: Final answer
    x = 346,755.10

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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.