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Finding the Fourth Proportional to 382.84, 528.58 and 278.12

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Solution

The fourth proportional to 382.84, 528.58 and 278.12 is: 384.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.84 : 528.58 = 278.12 : x
  2. Step 2: Convert to fraction form
    382.84/528.58 = 278.12/x
  3. Step 3: Cross multiply
    382.84x = 528.58 × 278.12
  4. Step 4: Simplify right side
    382.84x = 147,008.67
  5. Step 5: Solve for x
    x = 147,008.67/382.84
  6. Step 6: Final answer
    x = 384.00

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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.