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Finding the Fourth Proportional to 390.60, 585.60 and 195.54

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Solution

The fourth proportional to 390.60, 585.60 and 195.54 is: 293.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.60 : 585.60 = 195.54 : x
  2. Step 2: Convert to fraction form
    390.60/585.60 = 195.54/x
  3. Step 3: Cross multiply
    390.60x = 585.60 × 195.54
  4. Step 4: Simplify right side
    390.60x = 114,508.22
  5. Step 5: Solve for x
    x = 114,508.22/390.60
  6. Step 6: Final answer
    x = 293.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.