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Finding the Fourth Proportional to 844.88, 1,267.08 and 317.72

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Solution

The fourth proportional to 844.88, 1,267.08 and 317.72 is: 476.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.88 : 1,267.08 = 317.72 : x
  2. Step 2: Convert to fraction form
    844.88/1,267.08 = 317.72/x
  3. Step 3: Cross multiply
    844.88x = 1,267.08 × 317.72
  4. Step 4: Simplify right side
    844.88x = 402,576.66
  5. Step 5: Solve for x
    x = 402,576.66/844.88
  6. Step 6: Final answer
    x = 476.49

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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.