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Finding the Fourth Proportional to 215,611.40, 323,417.10 and 205,934.60

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Solution

The fourth proportional to 215,611.40, 323,417.10 and 205,934.60 is: 308,901.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,611.40 : 323,417.10 = 205,934.60 : x
  2. Step 2: Convert to fraction form
    215,611.40/323,417.10 = 205,934.60/x
  3. Step 3: Cross multiply
    215,611.40x = 323,417.10 × 205,934.60
  4. Step 4: Simplify right side
    215,611.40x = 66,602,771,121.66
  5. Step 5: Solve for x
    x = 66,602,771,121.66/215,611.40
  6. Step 6: Final answer
    x = 308,901.90

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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.