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Finding the Fourth Proportional to 744,843, 1,027,874.70 and 405,305.40

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Solution

The fourth proportional to 744,843, 1,027,874.70 and 405,305.40 is: 559,316.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,843 : 1,027,874.70 = 405,305.40 : x
  2. Step 2: Convert to fraction form
    744,843/1,027,874.70 = 405,305.40/x
  3. Step 3: Cross multiply
    744,843x = 1,027,874.70 × 405,305.40
  4. Step 4: Simplify right side
    744,843x = 416,603,166,433.38
  5. Step 5: Solve for x
    x = 416,603,166,433.38/744,843
  6. Step 6: Final answer
    x = 559,316.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.