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Finding the Fourth Proportional to 667,085.10, 1,000,627.65 and 401,145.90

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Solution

The fourth proportional to 667,085.10, 1,000,627.65 and 401,145.90 is: 601,718.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,085.10 : 1,000,627.65 = 401,145.90 : x
  2. Step 2: Convert to fraction form
    667,085.10/1,000,627.65 = 401,145.90/x
  3. Step 3: Cross multiply
    667,085.10x = 1,000,627.65 × 401,145.90
  4. Step 4: Simplify right side
    667,085.10x = 401,397,679,224.14
  5. Step 5: Solve for x
    x = 401,397,679,224.14/667,085.10
  6. Step 6: Final answer
    x = 601,718.85

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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.