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Finding the Fourth Proportional to 661,990.32, 992,113.92 and 262,413.27

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Solution

The fourth proportional to 661,990.32, 992,113.92 and 262,413.27 is: 393,274.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,990.32 : 992,113.92 = 262,413.27 : x
  2. Step 2: Convert to fraction form
    661,990.32/992,113.92 = 262,413.27/x
  3. Step 3: Cross multiply
    661,990.32x = 992,113.92 × 262,413.27
  4. Step 4: Simplify right side
    661,990.32x = 260,343,857,959.72
  5. Step 5: Solve for x
    x = 260,343,857,959.72/661,990.32
  6. Step 6: Final answer
    x = 393,274.42

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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.