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Finding the Fourth Proportional to 378.84, 521.73 and 377.64

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Solution

The fourth proportional to 378.84, 521.73 and 377.64 is: 520.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.84 : 521.73 = 377.64 : x
  2. Step 2: Convert to fraction form
    378.84/521.73 = 377.64/x
  3. Step 3: Cross multiply
    378.84x = 521.73 × 377.64
  4. Step 4: Simplify right side
    378.84x = 197,026.12
  5. Step 5: Solve for x
    x = 197,026.12/378.84
  6. Step 6: Final answer
    x = 520.08

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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.