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Finding the Fourth Proportional to 157.36, 215.92 and 153.28

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Solution

The fourth proportional to 157.36, 215.92 and 153.28 is: 210.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.36 : 215.92 = 153.28 : x
  2. Step 2: Convert to fraction form
    157.36/215.92 = 153.28/x
  3. Step 3: Cross multiply
    157.36x = 215.92 × 153.28
  4. Step 4: Simplify right side
    157.36x = 33,096.22
  5. Step 5: Solve for x
    x = 33,096.22/157.36
  6. Step 6: Final answer
    x = 210.32

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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.