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Finding the Fourth Proportional to 428,889.84, 644,340.12 and 404,653.32

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Solution

The fourth proportional to 428,889.84, 644,340.12 and 404,653.32 is: 607,928.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,889.84 : 644,340.12 = 404,653.32 : x
  2. Step 2: Convert to fraction form
    428,889.84/644,340.12 = 404,653.32/x
  3. Step 3: Cross multiply
    428,889.84x = 644,340.12 × 404,653.32
  4. Step 4: Simplify right side
    428,889.84x = 260,734,367,249.75
  5. Step 5: Solve for x
    x = 260,734,367,249.75/428,889.84
  6. Step 6: Final answer
    x = 607,928.53

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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.