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Finding the Fourth Proportional to 361,890.95, 499,357.79 and 216,661.94

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Solution

The fourth proportional to 361,890.95, 499,357.79 and 216,661.94 is: 298,962.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,890.95 : 499,357.79 = 216,661.94 : x
  2. Step 2: Convert to fraction form
    361,890.95/499,357.79 = 216,661.94/x
  3. Step 3: Cross multiply
    361,890.95x = 499,357.79 × 216,661.94
  4. Step 4: Simplify right side
    361,890.95x = 108,191,825,038.72
  5. Step 5: Solve for x
    x = 108,191,825,038.72/361,890.95
  6. Step 6: Final answer
    x = 298,962.51

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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.