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Finding the Fourth Proportional to 390.23, 585.14 and 195.02

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Solution

The fourth proportional to 390.23, 585.14 and 195.02 is: 292.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.23 : 585.14 = 195.02 : x
  2. Step 2: Convert to fraction form
    390.23/585.14 = 195.02/x
  3. Step 3: Cross multiply
    390.23x = 585.14 × 195.02
  4. Step 4: Simplify right side
    390.23x = 114,110.10
  5. Step 5: Solve for x
    x = 114,110.10/390.23
  6. Step 6: Final answer
    x = 292.42

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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.