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Finding the Fourth Proportional to 391,328.20, 586,752.41 and 166,560.64

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Solution

The fourth proportional to 391,328.20, 586,752.41 and 166,560.64 is: 249,738.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,328.20 : 586,752.41 = 166,560.64 : x
  2. Step 2: Convert to fraction form
    391,328.20/586,752.41 = 166,560.64/x
  3. Step 3: Cross multiply
    391,328.20x = 586,752.41 × 166,560.64
  4. Step 4: Simplify right side
    391,328.20x = 97,729,856,931.14
  5. Step 5: Solve for x
    x = 97,729,856,931.14/391,328.20
  6. Step 6: Final answer
    x = 249,738.86

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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.