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Finding the Fourth Proportional to 259.22, 357.76 and 148.72

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Solution

The fourth proportional to 259.22, 357.76 and 148.72 is: 205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.22 : 357.76 = 148.72 : x
  2. Step 2: Convert to fraction form
    259.22/357.76 = 148.72/x
  3. Step 3: Cross multiply
    259.22x = 357.76 × 148.72
  4. Step 4: Simplify right side
    259.22x = 53,206.07
  5. Step 5: Solve for x
    x = 53,206.07/259.22
  6. Step 6: Final answer
    x = 205.25

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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.