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Finding the Fourth Proportional to 486,091.40, 729,172.15 and 186,571.98

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Solution

The fourth proportional to 486,091.40, 729,172.15 and 186,571.98 is: 279,871.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,091.40 : 729,172.15 = 186,571.98 : x
  2. Step 2: Convert to fraction form
    486,091.40/729,172.15 = 186,571.98/x
  3. Step 3: Cross multiply
    486,091.40x = 729,172.15 × 186,571.98
  4. Step 4: Simplify right side
    486,091.40x = 136,043,090,853.50
  5. Step 5: Solve for x
    x = 136,043,090,853.50/486,091.40
  6. Step 6: Final answer
    x = 279,871.42

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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.