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Finding the Fourth Proportional to 474.98, 713.24 and 398.57

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Solution

The fourth proportional to 474.98, 713.24 and 398.57 is: 598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.98 : 713.24 = 398.57 : x
  2. Step 2: Convert to fraction form
    474.98/713.24 = 398.57/x
  3. Step 3: Cross multiply
    474.98x = 713.24 × 398.57
  4. Step 4: Simplify right side
    474.98x = 284,272.00
  5. Step 5: Solve for x
    x = 284,272.00/474.98
  6. Step 6: Final answer
    x = 598.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.