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Finding the Fourth Proportional to 418,766.60, 628,129.10 and 134,471.06

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Solution

The fourth proportional to 418,766.60, 628,129.10 and 134,471.06 is: 201,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,766.60 : 628,129.10 = 134,471.06 : x
  2. Step 2: Convert to fraction form
    418,766.60/628,129.10 = 134,471.06/x
  3. Step 3: Cross multiply
    418,766.60x = 628,129.10 × 134,471.06
  4. Step 4: Simplify right side
    418,766.60x = 84,465,185,893.85
  5. Step 5: Solve for x
    x = 84,465,185,893.85/418,766.60
  6. Step 6: Final answer
    x = 201,699.91

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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.