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Finding the Fourth Proportional to 211.53, 317.00 and 124.91

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Solution

The fourth proportional to 211.53, 317.00 and 124.91 is: 187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.53 : 317.00 = 124.91 : x
  2. Step 2: Convert to fraction form
    211.53/317.00 = 124.91/x
  3. Step 3: Cross multiply
    211.53x = 317.00 × 124.91
  4. Step 4: Simplify right side
    211.53x = 39,594.26
  5. Step 5: Solve for x
    x = 39,594.26/211.53
  6. Step 6: Final answer
    x = 187.18

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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.