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Finding the Fourth Proportional to 667,715.40, 1,001,573.10 and 401,338.80

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Solution

The fourth proportional to 667,715.40, 1,001,573.10 and 401,338.80 is: 602,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,715.40 : 1,001,573.10 = 401,338.80 : x
  2. Step 2: Convert to fraction form
    667,715.40/1,001,573.10 = 401,338.80/x
  3. Step 3: Cross multiply
    667,715.40x = 1,001,573.10 × 401,338.80
  4. Step 4: Simplify right side
    667,715.40x = 401,970,146,066.28
  5. Step 5: Solve for x
    x = 401,970,146,066.28/667,715.40
  6. Step 6: Final answer
    x = 602,008.20

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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.