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Finding the Fourth Proportional to 722,691.45, 997,301.30 and 400,395.11

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Solution

The fourth proportional to 722,691.45, 997,301.30 and 400,395.11 is: 552,538.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,691.45 : 997,301.30 = 400,395.11 : x
  2. Step 2: Convert to fraction form
    722,691.45/997,301.30 = 400,395.11/x
  3. Step 3: Cross multiply
    722,691.45x = 997,301.30 × 400,395.11
  4. Step 4: Simplify right side
    722,691.45x = 399,314,556,728.16
  5. Step 5: Solve for x
    x = 399,314,556,728.16/722,691.45
  6. Step 6: Final answer
    x = 552,538.09

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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.