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Finding the Fourth Proportional to 266,208.84, 399,311.64 and 66,528.20

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Solution

The fourth proportional to 266,208.84, 399,311.64 and 66,528.20 is: 99,791.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,208.84 : 399,311.64 = 66,528.20 : x
  2. Step 2: Convert to fraction form
    266,208.84/399,311.64 = 66,528.20/x
  3. Step 3: Cross multiply
    266,208.84x = 399,311.64 × 66,528.20
  4. Step 4: Simplify right side
    266,208.84x = 26,565,484,648.25
  5. Step 5: Solve for x
    x = 26,565,484,648.25/266,208.84
  6. Step 6: Final answer
    x = 99,791.90

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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.