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Finding the Fourth Proportional to 655,846.31, 983,907.71 and 212,579.75

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Solution

The fourth proportional to 655,846.31, 983,907.71 and 212,579.75 is: 318,914.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,846.31 : 983,907.71 = 212,579.75 : x
  2. Step 2: Convert to fraction form
    655,846.31/983,907.71 = 212,579.75/x
  3. Step 3: Cross multiply
    655,846.31x = 983,907.71 × 212,579.75
  4. Step 4: Simplify right side
    655,846.31x = 209,158,853,951.97
  5. Step 5: Solve for x
    x = 209,158,853,951.97/655,846.31
  6. Step 6: Final answer
    x = 318,914.43

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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.