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Finding the Fourth Proportional to 388,742.88, 536,481.81 and 216,660.81

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Solution

The fourth proportional to 388,742.88, 536,481.81 and 216,660.81 is: 299,001.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,742.88 : 536,481.81 = 216,660.81 : x
  2. Step 2: Convert to fraction form
    388,742.88/536,481.81 = 216,660.81/x
  3. Step 3: Cross multiply
    388,742.88x = 536,481.81 × 216,660.81
  4. Step 4: Simplify right side
    388,742.88x = 116,234,583,504.87
  5. Step 5: Solve for x
    x = 116,234,583,504.87/388,742.88
  6. Step 6: Final answer
    x = 299,001.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.