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Finding the Fourth Proportional to 511,490.72, 705,831.36 and 285,092.48

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Solution

The fourth proportional to 511,490.72, 705,831.36 and 285,092.48 is: 393,413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,490.72 : 705,831.36 = 285,092.48 : x
  2. Step 2: Convert to fraction form
    511,490.72/705,831.36 = 285,092.48/x
  3. Step 3: Cross multiply
    511,490.72x = 705,831.36 × 285,092.48
  4. Step 4: Simplify right side
    511,490.72x = 201,227,212,884.17
  5. Step 5: Solve for x
    x = 201,227,212,884.17/511,490.72
  6. Step 6: Final answer
    x = 393,413.22

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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.