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Finding the Fourth Proportional to 713.86, 984.81 and 418.99

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Solution

The fourth proportional to 713.86, 984.81 and 418.99 is: 578.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.86 : 984.81 = 418.99 : x
  2. Step 2: Convert to fraction form
    713.86/984.81 = 418.99/x
  3. Step 3: Cross multiply
    713.86x = 984.81 × 418.99
  4. Step 4: Simplify right side
    713.86x = 412,623.45
  5. Step 5: Solve for x
    x = 412,623.45/713.86
  6. Step 6: Final answer
    x = 578.02

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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.