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Finding the Fourth Proportional to 255.85, 353.12 and 151.00

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Solution

The fourth proportional to 255.85, 353.12 and 151.00 is: 208.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.85 : 353.12 = 151.00 : x
  2. Step 2: Convert to fraction form
    255.85/353.12 = 151.00/x
  3. Step 3: Cross multiply
    255.85x = 353.12 × 151.00
  4. Step 4: Simplify right side
    255.85x = 53,319.48
  5. Step 5: Solve for x
    x = 53,319.48/255.85
  6. Step 6: Final answer
    x = 208.40

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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.