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Finding the Fourth Proportional to 431,181.39, 646,722.54 and 115,613.49

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Solution

The fourth proportional to 431,181.39, 646,722.54 and 115,613.49 is: 173,406.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,181.39 : 646,722.54 = 115,613.49 : x
  2. Step 2: Convert to fraction form
    431,181.39/646,722.54 = 115,613.49/x
  3. Step 3: Cross multiply
    431,181.39x = 646,722.54 × 115,613.49
  4. Step 4: Simplify right side
    431,181.39x = 74,769,849,911.06
  5. Step 5: Solve for x
    x = 74,769,849,911.06/431,181.39
  6. Step 6: Final answer
    x = 173,406.95

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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.