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Finding the Fourth Proportional to 211,625.70, 317,438.55 and 208,515.30

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Solution

The fourth proportional to 211,625.70, 317,438.55 and 208,515.30 is: 312,772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,625.70 : 317,438.55 = 208,515.30 : x
  2. Step 2: Convert to fraction form
    211,625.70/317,438.55 = 208,515.30/x
  3. Step 3: Cross multiply
    211,625.70x = 317,438.55 × 208,515.30
  4. Step 4: Simplify right side
    211,625.70x = 66,190,794,484.82
  5. Step 5: Solve for x
    x = 66,190,794,484.82/211,625.70
  6. Step 6: Final answer
    x = 312,772.95

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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.