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Finding the Fourth Proportional to 611,266.16, 916,910.52 and 211,919.92

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Solution

The fourth proportional to 611,266.16, 916,910.52 and 211,919.92 is: 317,883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,266.16 : 916,910.52 = 211,919.92 : x
  2. Step 2: Convert to fraction form
    611,266.16/916,910.52 = 211,919.92/x
  3. Step 3: Cross multiply
    611,266.16x = 916,910.52 × 211,919.92
  4. Step 4: Simplify right side
    611,266.16x = 194,311,604,045.56
  5. Step 5: Solve for x
    x = 194,311,604,045.56/611,266.16
  6. Step 6: Final answer
    x = 317,883.79

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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.