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Finding the Fourth Proportional to 380.20, 569.74 and 339.16

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Solution

The fourth proportional to 380.20, 569.74 and 339.16 is: 508.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.20 : 569.74 = 339.16 : x
  2. Step 2: Convert to fraction form
    380.20/569.74 = 339.16/x
  3. Step 3: Cross multiply
    380.20x = 569.74 × 339.16
  4. Step 4: Simplify right side
    380.20x = 193,233.02
  5. Step 5: Solve for x
    x = 193,233.02/380.20
  6. Step 6: Final answer
    x = 508.24

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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.