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Finding the Fourth Proportional to 404,328.30, 606,546.45 and 138,021.90

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Solution

The fourth proportional to 404,328.30, 606,546.45 and 138,021.90 is: 207,051.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,328.30 : 606,546.45 = 138,021.90 : x
  2. Step 2: Convert to fraction form
    404,328.30/606,546.45 = 138,021.90/x
  3. Step 3: Cross multiply
    404,328.30x = 606,546.45 × 138,021.90
  4. Step 4: Simplify right side
    404,328.30x = 83,716,693,467.26
  5. Step 5: Solve for x
    x = 83,716,693,467.26/404,328.30
  6. Step 6: Final answer
    x = 207,051.28

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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.