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Finding the Fourth Proportional to 661,515.86, 992,601.84 and 262,147.79

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Solution

The fourth proportional to 661,515.86, 992,601.84 and 262,147.79 is: 393,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,515.86 : 992,601.84 = 262,147.79 : x
  2. Step 2: Convert to fraction form
    661,515.86/992,601.84 = 262,147.79/x
  3. Step 3: Cross multiply
    661,515.86x = 992,601.84 × 262,147.79
  4. Step 4: Simplify right side
    661,515.86x = 260,208,382,170.49
  5. Step 5: Solve for x
    x = 260,208,382,170.49/661,515.86
  6. Step 6: Final answer
    x = 393,351.69

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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.