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Finding the Fourth Proportional to 390.06, 585.27 and 236.07

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Solution

The fourth proportional to 390.06, 585.27 and 236.07 is: 354.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.06 : 585.27 = 236.07 : x
  2. Step 2: Convert to fraction form
    390.06/585.27 = 236.07/x
  3. Step 3: Cross multiply
    390.06x = 585.27 × 236.07
  4. Step 4: Simplify right side
    390.06x = 138,164.69
  5. Step 5: Solve for x
    x = 138,164.69/390.06
  6. Step 6: Final answer
    x = 354.21

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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.