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Finding the Fourth Proportional to 668,879.20, 1,003,318.80 and 403,458.40

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Solution

The fourth proportional to 668,879.20, 1,003,318.80 and 403,458.40 is: 605,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,879.20 : 1,003,318.80 = 403,458.40 : x
  2. Step 2: Convert to fraction form
    668,879.20/1,003,318.80 = 403,458.40/x
  3. Step 3: Cross multiply
    668,879.20x = 1,003,318.80 × 403,458.40
  4. Step 4: Simplify right side
    668,879.20x = 404,797,397,737.92
  5. Step 5: Solve for x
    x = 404,797,397,737.92/668,879.20
  6. Step 6: Final answer
    x = 605,187.60

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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.