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Finding the Fourth Proportional to 211,234.64, 316,064.52 and 208,872.56

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Solution

The fourth proportional to 211,234.64, 316,064.52 and 208,872.56 is: 312,530.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,234.64 : 316,064.52 = 208,872.56 : x
  2. Step 2: Convert to fraction form
    211,234.64/316,064.52 = 208,872.56/x
  3. Step 3: Cross multiply
    211,234.64x = 316,064.52 × 208,872.56
  4. Step 4: Simplify right side
    211,234.64x = 66,017,205,417.57
  5. Step 5: Solve for x
    x = 66,017,205,417.57/211,234.64
  6. Step 6: Final answer
    x = 312,530.21

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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.