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Finding the Fourth Proportional to 418,722.80, 628,072.35 and 134,411.13

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Solution

The fourth proportional to 418,722.80, 628,072.35 and 134,411.13 is: 201,612.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,722.80 : 628,072.35 = 134,411.13 : x
  2. Step 2: Convert to fraction form
    418,722.80/628,072.35 = 134,411.13/x
  3. Step 3: Cross multiply
    418,722.80x = 628,072.35 × 134,411.13
  4. Step 4: Simplify right side
    418,722.80x = 84,419,914,285.26
  5. Step 5: Solve for x
    x = 84,419,914,285.26/418,722.80
  6. Step 6: Final answer
    x = 201,612.89

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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.