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Finding the Fourth Proportional to 157.15, 216.79 and 146.59

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Solution

The fourth proportional to 157.15, 216.79 and 146.59 is: 202.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.15 : 216.79 = 146.59 : x
  2. Step 2: Convert to fraction form
    157.15/216.79 = 146.59/x
  3. Step 3: Cross multiply
    157.15x = 216.79 × 146.59
  4. Step 4: Simplify right side
    157.15x = 31,778.34
  5. Step 5: Solve for x
    x = 31,778.34/157.15
  6. Step 6: Final answer
    x = 202.21

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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.