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Finding the Fourth Proportional to 611,713.64, 917,579.69 and 212,367.10

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Solution

The fourth proportional to 611,713.64, 917,579.69 and 212,367.10 is: 318,553.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,713.64 : 917,579.69 = 212,367.10 : x
  2. Step 2: Convert to fraction form
    611,713.64/917,579.69 = 212,367.10/x
  3. Step 3: Cross multiply
    611,713.64x = 917,579.69 × 212,367.10
  4. Step 4: Simplify right side
    611,713.64x = 194,863,737,784.20
  5. Step 5: Solve for x
    x = 194,863,737,784.20/611,713.64
  6. Step 6: Final answer
    x = 318,553.85

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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.