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Finding the Fourth Proportional to 211.33, 291.45 and 153.10

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Solution

The fourth proportional to 211.33, 291.45 and 153.10 is: 211.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.33 : 291.45 = 153.10 : x
  2. Step 2: Convert to fraction form
    211.33/291.45 = 153.10/x
  3. Step 3: Cross multiply
    211.33x = 291.45 × 153.10
  4. Step 4: Simplify right side
    211.33x = 44,621.00
  5. Step 5: Solve for x
    x = 44,621.00/211.33
  6. Step 6: Final answer
    x = 211.14

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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.