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Finding the Fourth Proportional to 642,287.48, 963,198.52 and 215,695.68

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Solution

The fourth proportional to 642,287.48, 963,198.52 and 215,695.68 is: 323,465.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,287.48 : 963,198.52 = 215,695.68 : x
  2. Step 2: Convert to fraction form
    642,287.48/963,198.52 = 215,695.68/x
  3. Step 3: Cross multiply
    642,287.48x = 963,198.52 × 215,695.68
  4. Step 4: Simplify right side
    642,287.48x = 207,757,759,746.39
  5. Step 5: Solve for x
    x = 207,757,759,746.39/642,287.48
  6. Step 6: Final answer
    x = 323,465.37

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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.