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Finding the Fourth Proportional to 153.42, 210.86 and 149.10

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Solution

The fourth proportional to 153.42, 210.86 and 149.10 is: 204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.42 : 210.86 = 149.10 : x
  2. Step 2: Convert to fraction form
    153.42/210.86 = 149.10/x
  3. Step 3: Cross multiply
    153.42x = 210.86 × 149.10
  4. Step 4: Simplify right side
    153.42x = 31,438.48
  5. Step 5: Solve for x
    x = 31,438.48/153.42
  6. Step 6: Final answer
    x = 204.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.