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Finding the Fourth Proportional to 389.81, 537.53 and 350.63

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Solution

The fourth proportional to 389.81, 537.53 and 350.63 is: 483.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.81 : 537.53 = 350.63 : x
  2. Step 2: Convert to fraction form
    389.81/537.53 = 350.63/x
  3. Step 3: Cross multiply
    389.81x = 537.53 × 350.63
  4. Step 4: Simplify right side
    389.81x = 188,472.39
  5. Step 5: Solve for x
    x = 188,472.39/389.81
  6. Step 6: Final answer
    x = 483.50

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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.