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Finding the Fourth Proportional to 382.93, 528.65 and 307.42

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Solution

The fourth proportional to 382.93, 528.65 and 307.42 is: 424.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.93 : 528.65 = 307.42 : x
  2. Step 2: Convert to fraction form
    382.93/528.65 = 307.42/x
  3. Step 3: Cross multiply
    382.93x = 528.65 × 307.42
  4. Step 4: Simplify right side
    382.93x = 162,517.58
  5. Step 5: Solve for x
    x = 162,517.58/382.93
  6. Step 6: Final answer
    x = 424.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.