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Finding the Fourth Proportional to 611,163.20, 916,525.20 and 211,696.40

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Solution

The fourth proportional to 611,163.20, 916,525.20 and 211,696.40 is: 317,468.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,163.20 : 916,525.20 = 211,696.40 : x
  2. Step 2: Convert to fraction form
    611,163.20/916,525.20 = 211,696.40/x
  3. Step 3: Cross multiply
    611,163.20x = 916,525.20 × 211,696.40
  4. Step 4: Simplify right side
    611,163.20x = 194,025,085,349.28
  5. Step 5: Solve for x
    x = 194,025,085,349.28/611,163.20
  6. Step 6: Final answer
    x = 317,468.53

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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.