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Finding the Fourth Proportional to 668,886.70, 1,003,330.05 and 403,465.90

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Solution

The fourth proportional to 668,886.70, 1,003,330.05 and 403,465.90 is: 605,198.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,886.70 : 1,003,330.05 = 403,465.90 : x
  2. Step 2: Convert to fraction form
    668,886.70/1,003,330.05 = 403,465.90/x
  3. Step 3: Cross multiply
    668,886.70x = 1,003,330.05 × 403,465.90
  4. Step 4: Simplify right side
    668,886.70x = 404,809,461,620.30
  5. Step 5: Solve for x
    x = 404,809,461,620.30/668,886.70
  6. Step 6: Final answer
    x = 605,198.85

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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.