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Finding the Fourth Proportional to 391,338.21, 586,767.41 and 166,570.65

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Solution

The fourth proportional to 391,338.21, 586,767.41 and 166,570.65 is: 249,753.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,338.21 : 586,767.41 = 166,570.65 : x
  2. Step 2: Convert to fraction form
    391,338.21/586,767.41 = 166,570.65/x
  3. Step 3: Cross multiply
    391,338.21x = 586,767.41 × 166,570.65
  4. Step 4: Simplify right side
    391,338.21x = 97,738,228,049.66
  5. Step 5: Solve for x
    x = 97,738,228,049.66/391,338.21
  6. Step 6: Final answer
    x = 249,753.86

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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.