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Finding the Fourth Proportional to 211.48, 291.86 and 124.16

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Solution

The fourth proportional to 211.48, 291.86 and 124.16 is: 171.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.48 : 291.86 = 124.16 : x
  2. Step 2: Convert to fraction form
    211.48/291.86 = 124.16/x
  3. Step 3: Cross multiply
    211.48x = 291.86 × 124.16
  4. Step 4: Simplify right side
    211.48x = 36,237.34
  5. Step 5: Solve for x
    x = 36,237.34/211.48
  6. Step 6: Final answer
    x = 171.35

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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.