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Finding the Fourth Proportional to 658,568.48, 987,998.64 and 209,426.72

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Solution

The fourth proportional to 658,568.48, 987,998.64 and 209,426.72 is: 314,186.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,568.48 : 987,998.64 = 209,426.72 : x
  2. Step 2: Convert to fraction form
    658,568.48/987,998.64 = 209,426.72/x
  3. Step 3: Cross multiply
    658,568.48x = 987,998.64 × 209,426.72
  4. Step 4: Simplify right side
    658,568.48x = 206,913,314,539.66
  5. Step 5: Solve for x
    x = 206,913,314,539.66/658,568.48
  6. Step 6: Final answer
    x = 314,186.48

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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.