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Finding the Fourth Proportional to 431,574.90, 646,815.60 and 164,979.60

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Solution

The fourth proportional to 431,574.90, 646,815.60 and 164,979.60 is: 247,260.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,574.90 : 646,815.60 = 164,979.60 : x
  2. Step 2: Convert to fraction form
    431,574.90/646,815.60 = 164,979.60/x
  3. Step 3: Cross multiply
    431,574.90x = 646,815.60 × 164,979.60
  4. Step 4: Simplify right side
    431,574.90x = 106,711,378,961.76
  5. Step 5: Solve for x
    x = 106,711,378,961.76/431,574.90
  6. Step 6: Final answer
    x = 247,260.39

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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.