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Finding the Fourth Proportional to 668,881.20, 1,003,321.80 and 403,460.40

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Solution

The fourth proportional to 668,881.20, 1,003,321.80 and 403,460.40 is: 605,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,881.20 : 1,003,321.80 = 403,460.40 : x
  2. Step 2: Convert to fraction form
    668,881.20/1,003,321.80 = 403,460.40/x
  3. Step 3: Cross multiply
    668,881.20x = 1,003,321.80 × 403,460.40
  4. Step 4: Simplify right side
    668,881.20x = 404,800,614,756.72
  5. Step 5: Solve for x
    x = 404,800,614,756.72/668,881.20
  6. Step 6: Final answer
    x = 605,190.60

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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.