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Finding the Fourth Proportional to 352, 485.90 and 235.90

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Solution

The fourth proportional to 352, 485.90 and 235.90 is: 325.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    352 : 485.90 = 235.90 : x
  2. Step 2: Convert to fraction form
    352/485.90 = 235.90/x
  3. Step 3: Cross multiply
    352x = 485.90 × 235.90
  4. Step 4: Simplify right side
    352x = 114,623.81
  5. Step 5: Solve for x
    x = 114,623.81/352
  6. Step 6: Final answer
    x = 325.64

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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.