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Finding the Fourth Proportional to 386.22, 575.58 and 374.51

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Solution

The fourth proportional to 386.22, 575.58 and 374.51 is: 558.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.22 : 575.58 = 374.51 : x
  2. Step 2: Convert to fraction form
    386.22/575.58 = 374.51/x
  3. Step 3: Cross multiply
    386.22x = 575.58 × 374.51
  4. Step 4: Simplify right side
    386.22x = 215,560.47
  5. Step 5: Solve for x
    x = 215,560.47/386.22
  6. Step 6: Final answer
    x = 558.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.