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Finding the Fourth Proportional to 254.79, 381.53 and 157.00

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Solution

The fourth proportional to 254.79, 381.53 and 157.00 is: 235.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.79 : 381.53 = 157.00 : x
  2. Step 2: Convert to fraction form
    254.79/381.53 = 157.00/x
  3. Step 3: Cross multiply
    254.79x = 381.53 × 157.00
  4. Step 4: Simplify right side
    254.79x = 59,899.65
  5. Step 5: Solve for x
    x = 59,899.65/254.79
  6. Step 6: Final answer
    x = 235.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.