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Finding the Fourth Proportional to 391,379.20, 586,919.76 and 166,597.76

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Solution

The fourth proportional to 391,379.20, 586,919.76 and 166,597.76 is: 249,833.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,379.20 : 586,919.76 = 166,597.76 : x
  2. Step 2: Convert to fraction form
    391,379.20/586,919.76 = 166,597.76/x
  3. Step 3: Cross multiply
    391,379.20x = 586,919.76 × 166,597.76
  4. Step 4: Simplify right side
    391,379.20x = 97,779,517,315.74
  5. Step 5: Solve for x
    x = 97,779,517,315.74/391,379.20
  6. Step 6: Final answer
    x = 249,833.20

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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.