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Finding the Fourth Proportional to 325.39, 449.70 and 242.47

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Solution

The fourth proportional to 325.39, 449.70 and 242.47 is: 335.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.39 : 449.70 = 242.47 : x
  2. Step 2: Convert to fraction form
    325.39/449.70 = 242.47/x
  3. Step 3: Cross multiply
    325.39x = 449.70 × 242.47
  4. Step 4: Simplify right side
    325.39x = 109,038.51
  5. Step 5: Solve for x
    x = 109,038.51/325.39
  6. Step 6: Final answer
    x = 335.10

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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.