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Finding the Fourth Proportional to 418,664.40, 627,996.60 and 402,334.80

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Solution

The fourth proportional to 418,664.40, 627,996.60 and 402,334.80 is: 603,502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,664.40 : 627,996.60 = 402,334.80 : x
  2. Step 2: Convert to fraction form
    418,664.40/627,996.60 = 402,334.80/x
  3. Step 3: Cross multiply
    418,664.40x = 627,996.60 × 402,334.80
  4. Step 4: Simplify right side
    418,664.40x = 252,664,886,461.68
  5. Step 5: Solve for x
    x = 252,664,886,461.68/418,664.40
  6. Step 6: Final answer
    x = 603,502.20

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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.