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Finding the Fourth Proportional to 389.96, 587.99 and 357.67

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Solution

The fourth proportional to 389.96, 587.99 and 357.67 is: 539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.96 : 587.99 = 357.67 : x
  2. Step 2: Convert to fraction form
    389.96/587.99 = 357.67/x
  3. Step 3: Cross multiply
    389.96x = 587.99 × 357.67
  4. Step 4: Simplify right side
    389.96x = 210,306.38
  5. Step 5: Solve for x
    x = 210,306.38/389.96
  6. Step 6: Final answer
    x = 539.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.