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Finding the Fourth Proportional to 43,381.88, 64,949.80 and 28,406.48

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Solution

The fourth proportional to 43,381.88, 64,949.80 and 28,406.48 is: 42,529.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,381.88 : 64,949.80 = 28,406.48 : x
  2. Step 2: Convert to fraction form
    43,381.88/64,949.80 = 28,406.48/x
  3. Step 3: Cross multiply
    43,381.88x = 64,949.80 × 28,406.48
  4. Step 4: Simplify right side
    43,381.88x = 1,844,995,194.70
  5. Step 5: Solve for x
    x = 1,844,995,194.70/43,381.88
  6. Step 6: Final answer
    x = 42,529.17

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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.