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Finding the Fourth Proportional to 393,527.31, 543,025.81 and 221,442.27

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Solution

The fourth proportional to 393,527.31, 543,025.81 and 221,442.27 is: 305,566.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,527.31 : 543,025.81 = 221,442.27 : x
  2. Step 2: Convert to fraction form
    393,527.31/543,025.81 = 221,442.27/x
  3. Step 3: Cross multiply
    393,527.31x = 543,025.81 × 221,442.27
  4. Step 4: Simplify right side
    393,527.31x = 120,248,868,962.96
  5. Step 5: Solve for x
    x = 120,248,868,962.96/393,527.31
  6. Step 6: Final answer
    x = 305,566.77

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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.