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Finding the Fourth Proportional to 678.03, 935.69 and 383.33

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Solution

The fourth proportional to 678.03, 935.69 and 383.33 is: 528.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.03 : 935.69 = 383.33 : x
  2. Step 2: Convert to fraction form
    678.03/935.69 = 383.33/x
  3. Step 3: Cross multiply
    678.03x = 935.69 × 383.33
  4. Step 4: Simplify right side
    678.03x = 358,671.45
  5. Step 5: Solve for x
    x = 358,671.45/678.03
  6. Step 6: Final answer
    x = 528.99

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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.