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Finding the Fourth Proportional to 409.98, 565.37 and 347.98

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Solution

The fourth proportional to 409.98, 565.37 and 347.98 is: 479.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.98 : 565.37 = 347.98 : x
  2. Step 2: Convert to fraction form
    409.98/565.37 = 347.98/x
  3. Step 3: Cross multiply
    409.98x = 565.37 × 347.98
  4. Step 4: Simplify right side
    409.98x = 196,737.45
  5. Step 5: Solve for x
    x = 196,737.45/409.98
  6. Step 6: Final answer
    x = 479.87

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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.