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Finding the Fourth Proportional to 286,660.85, 395,596.71 and 157,604.78

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Solution

The fourth proportional to 286,660.85, 395,596.71 and 157,604.78 is: 217,497.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,660.85 : 395,596.71 = 157,604.78 : x
  2. Step 2: Convert to fraction form
    286,660.85/395,596.71 = 157,604.78/x
  3. Step 3: Cross multiply
    286,660.85x = 395,596.71 × 157,604.78
  4. Step 4: Simplify right side
    286,660.85x = 62,347,932,448.27
  5. Step 5: Solve for x
    x = 62,347,932,448.27/286,660.85
  6. Step 6: Final answer
    x = 217,497.20

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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.