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Finding the Fourth Proportional to 713.84, 984.96 and 403.28

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Solution

The fourth proportional to 713.84, 984.96 and 403.28 is: 556.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.84 : 984.96 = 403.28 : x
  2. Step 2: Convert to fraction form
    713.84/984.96 = 403.28/x
  3. Step 3: Cross multiply
    713.84x = 984.96 × 403.28
  4. Step 4: Simplify right side
    713.84x = 397,214.67
  5. Step 5: Solve for x
    x = 397,214.67/713.84
  6. Step 6: Final answer
    x = 556.45

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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.