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Finding the Fourth Proportional to 417,972.40, 627,112.20 and 168,679.60

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Solution

The fourth proportional to 417,972.40, 627,112.20 and 168,679.60 is: 253,081.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,972.40 : 627,112.20 = 168,679.60 : x
  2. Step 2: Convert to fraction form
    417,972.40/627,112.20 = 168,679.60/x
  3. Step 3: Cross multiply
    417,972.40x = 627,112.20 × 168,679.60
  4. Step 4: Simplify right side
    417,972.40x = 105,781,035,051.12
  5. Step 5: Solve for x
    x = 105,781,035,051.12/417,972.40
  6. Step 6: Final answer
    x = 253,081.39

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1.5x scale

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.