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Finding the Fourth Proportional to 678.13, 935.81 and 367.63

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Solution

The fourth proportional to 678.13, 935.81 and 367.63 is: 507.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.13 : 935.81 = 367.63 : x
  2. Step 2: Convert to fraction form
    678.13/935.81 = 367.63/x
  3. Step 3: Cross multiply
    678.13x = 935.81 × 367.63
  4. Step 4: Simplify right side
    678.13x = 344,031.83
  5. Step 5: Solve for x
    x = 344,031.83/678.13
  6. Step 6: Final answer
    x = 507.32

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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.