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Finding the Fourth Proportional to 678.08, 935.75 and 367.58

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Solution

The fourth proportional to 678.08, 935.75 and 367.58 is: 507.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.08 : 935.75 = 367.58 : x
  2. Step 2: Convert to fraction form
    678.08/935.75 = 367.58/x
  3. Step 3: Cross multiply
    678.08x = 935.75 × 367.58
  4. Step 4: Simplify right side
    678.08x = 343,962.99
  5. Step 5: Solve for x
    x = 343,962.99/678.08
  6. Step 6: Final answer
    x = 507.26

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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.