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Finding the Fourth Proportional to 404,650.40, 606,975.60 and 138,419.60

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Solution

The fourth proportional to 404,650.40, 606,975.60 and 138,419.60 is: 207,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,650.40 : 606,975.60 = 138,419.60 : x
  2. Step 2: Convert to fraction form
    404,650.40/606,975.60 = 138,419.60/x
  3. Step 3: Cross multiply
    404,650.40x = 606,975.60 × 138,419.60
  4. Step 4: Simplify right side
    404,650.40x = 84,017,319,761.76
  5. Step 5: Solve for x
    x = 84,017,319,761.76/404,650.40
  6. Step 6: Final answer
    x = 207,629.40

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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.