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Finding the Fourth Proportional to 399,235.36, 550,936.56 and 217,950.88

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Solution

The fourth proportional to 399,235.36, 550,936.56 and 217,950.88 is: 300,767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,235.36 : 550,936.56 = 217,950.88 : x
  2. Step 2: Convert to fraction form
    399,235.36/550,936.56 = 217,950.88/x
  3. Step 3: Cross multiply
    399,235.36x = 550,936.56 × 217,950.88
  4. Step 4: Simplify right side
    399,235.36x = 120,077,108,076.17
  5. Step 5: Solve for x
    x = 120,077,108,076.17/399,235.36
  6. Step 6: Final answer
    x = 300,767.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.