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Finding the Fourth Proportional to 417,998.40, 627,151.20 and 168,705.60

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Solution

The fourth proportional to 417,998.40, 627,151.20 and 168,705.60 is: 253,120.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,998.40 : 627,151.20 = 168,705.60 : x
  2. Step 2: Convert to fraction form
    417,998.40/627,151.20 = 168,705.60/x
  3. Step 3: Cross multiply
    417,998.40x = 627,151.20 × 168,705.60
  4. Step 4: Simplify right side
    417,998.40x = 105,803,919,486.72
  5. Step 5: Solve for x
    x = 105,803,919,486.72/417,998.40
  6. Step 6: Final answer
    x = 253,120.39

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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.