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Finding the Fourth Proportional to 399,903.66, 548,929.49 and 353,566.60

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Solution

The fourth proportional to 399,903.66, 548,929.49 and 353,566.60 is: 485,324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,903.66 : 548,929.49 = 353,566.60 : x
  2. Step 2: Convert to fraction form
    399,903.66/548,929.49 = 353,566.60/x
  3. Step 3: Cross multiply
    399,903.66x = 548,929.49 × 353,566.60
  4. Step 4: Simplify right side
    399,903.66x = 194,083,133,419.03
  5. Step 5: Solve for x
    x = 194,083,133,419.03/399,903.66
  6. Step 6: Final answer
    x = 485,324.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.