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Finding the Fourth Proportional to 389.40, 536.19 and 336.85

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Solution

The fourth proportional to 389.40, 536.19 and 336.85 is: 463.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.40 : 536.19 = 336.85 : x
  2. Step 2: Convert to fraction form
    389.40/536.19 = 336.85/x
  3. Step 3: Cross multiply
    389.40x = 536.19 × 336.85
  4. Step 4: Simplify right side
    389.40x = 180,615.60
  5. Step 5: Solve for x
    x = 180,615.60/389.40
  6. Step 6: Final answer
    x = 463.83

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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.