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Finding the Fourth Proportional to 678.63, 936.50 and 368.13

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Solution

The fourth proportional to 678.63, 936.50 and 368.13 is: 508.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.63 : 936.50 = 368.13 : x
  2. Step 2: Convert to fraction form
    678.63/936.50 = 368.13/x
  3. Step 3: Cross multiply
    678.63x = 936.50 × 368.13
  4. Step 4: Simplify right side
    678.63x = 344,749.98
  5. Step 5: Solve for x
    x = 344,749.98/678.63
  6. Step 6: Final answer
    x = 508.01

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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.