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Finding the Fourth Proportional to 378.89, 564.80 and 358.37

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Solution

The fourth proportional to 378.89, 564.80 and 358.37 is: 534.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.89 : 564.80 = 358.37 : x
  2. Step 2: Convert to fraction form
    378.89/564.80 = 358.37/x
  3. Step 3: Cross multiply
    378.89x = 564.80 × 358.37
  4. Step 4: Simplify right side
    378.89x = 202,407.38
  5. Step 5: Solve for x
    x = 202,407.38/378.89
  6. Step 6: Final answer
    x = 534.21

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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.