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Finding the Fourth Proportional to 152.76, 209.64 and 151.68

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Solution

The fourth proportional to 152.76, 209.64 and 151.68 is: 208.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.76 : 209.64 = 151.68 : x
  2. Step 2: Convert to fraction form
    152.76/209.64 = 151.68/x
  3. Step 3: Cross multiply
    152.76x = 209.64 × 151.68
  4. Step 4: Simplify right side
    152.76x = 31,798.20
  5. Step 5: Solve for x
    x = 31,798.20/152.76
  6. Step 6: Final answer
    x = 208.16

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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.