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Finding the Fourth Proportional to 404,309.80, 606,518.70 and 138,003.40

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Solution

The fourth proportional to 404,309.80, 606,518.70 and 138,003.40 is: 207,023.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,309.80 : 606,518.70 = 138,003.40 : x
  2. Step 2: Convert to fraction form
    404,309.80/606,518.70 = 138,003.40/x
  3. Step 3: Cross multiply
    404,309.80x = 606,518.70 × 138,003.40
  4. Step 4: Simplify right side
    404,309.80x = 83,701,642,763.58
  5. Step 5: Solve for x
    x = 83,701,642,763.58/404,309.80
  6. Step 6: Final answer
    x = 207,023.53

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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.