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Finding the Fourth Proportional to 641,305.40, 960,921.30 and 404,223.80

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Solution

The fourth proportional to 641,305.40, 960,921.30 and 404,223.80 is: 605,682.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,305.40 : 960,921.30 = 404,223.80 : x
  2. Step 2: Convert to fraction form
    641,305.40/960,921.30 = 404,223.80/x
  3. Step 3: Cross multiply
    641,305.40x = 960,921.30 × 404,223.80
  4. Step 4: Simplify right side
    641,305.40x = 388,427,259,386.94
  5. Step 5: Solve for x
    x = 388,427,259,386.94/641,305.40
  6. Step 6: Final answer
    x = 605,682.19

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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.