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Finding the Fourth Proportional to 389.81, 583.29 and 235.87

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Solution

The fourth proportional to 389.81, 583.29 and 235.87 is: 352.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.81 : 583.29 = 235.87 : x
  2. Step 2: Convert to fraction form
    389.81/583.29 = 235.87/x
  3. Step 3: Cross multiply
    389.81x = 583.29 × 235.87
  4. Step 4: Simplify right side
    389.81x = 137,579.15
  5. Step 5: Solve for x
    x = 137,579.15/389.81
  6. Step 6: Final answer
    x = 352.94

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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.