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Finding the Fourth Proportional to 389.98, 585.03 and 349.60

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Solution

The fourth proportional to 389.98, 585.03 and 349.60 is: 524.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.98 : 585.03 = 349.60 : x
  2. Step 2: Convert to fraction form
    389.98/585.03 = 349.60/x
  3. Step 3: Cross multiply
    389.98x = 585.03 × 349.60
  4. Step 4: Simplify right side
    389.98x = 204,526.49
  5. Step 5: Solve for x
    x = 204,526.49/389.98
  6. Step 6: Final answer
    x = 524.45

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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.