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Finding the Fourth Proportional to 486,720.89, 729,280.70 and 166,696.28

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Solution

The fourth proportional to 486,720.89, 729,280.70 and 166,696.28 is: 249,770.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,720.89 : 729,280.70 = 166,696.28 : x
  2. Step 2: Convert to fraction form
    486,720.89/729,280.70 = 166,696.28/x
  3. Step 3: Cross multiply
    486,720.89x = 729,280.70 × 166,696.28
  4. Step 4: Simplify right side
    486,720.89x = 121,568,381,380.63
  5. Step 5: Solve for x
    x = 121,568,381,380.63/486,720.89
  6. Step 6: Final answer
    x = 249,770.21

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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.