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Finding the Fourth Proportional to 439.07, 608.63 and 423.95

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Solution

The fourth proportional to 439.07, 608.63 and 423.95 is: 587.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.07 : 608.63 = 423.95 : x
  2. Step 2: Convert to fraction form
    439.07/608.63 = 423.95/x
  3. Step 3: Cross multiply
    439.07x = 608.63 × 423.95
  4. Step 4: Simplify right side
    439.07x = 258,023.53
  5. Step 5: Solve for x
    x = 258,023.53/439.07
  6. Step 6: Final answer
    x = 587.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.