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Finding the Fourth Proportional to 373,287.83, 515,077.31 and 209,943.86

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Solution

The fourth proportional to 373,287.83, 515,077.31 and 209,943.86 is: 289,688.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,287.83 : 515,077.31 = 209,943.86 : x
  2. Step 2: Convert to fraction form
    373,287.83/515,077.31 = 209,943.86/x
  3. Step 3: Cross multiply
    373,287.83x = 515,077.31 × 209,943.86
  4. Step 4: Simplify right side
    373,287.83x = 108,137,317,610.10
  5. Step 5: Solve for x
    x = 108,137,317,610.10/373,287.83
  6. Step 6: Final answer
    x = 289,688.84

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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.