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Finding the Fourth Proportional to 661,424.94, 913,217.20 and 443,959.78

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Solution

The fourth proportional to 661,424.94, 913,217.20 and 443,959.78 is: 612,967.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,424.94 : 913,217.20 = 443,959.78 : x
  2. Step 2: Convert to fraction form
    661,424.94/913,217.20 = 443,959.78/x
  3. Step 3: Cross multiply
    661,424.94x = 913,217.20 × 443,959.78
  4. Step 4: Simplify right side
    661,424.94x = 405,431,707,204.22
  5. Step 5: Solve for x
    x = 405,431,707,204.22/661,424.94
  6. Step 6: Final answer
    x = 612,967.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.