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Finding the Fourth Proportional to 447.76, 670.91 and 430.67

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Solution

The fourth proportional to 447.76, 670.91 and 430.67 is: 645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.76 : 670.91 = 430.67 : x
  2. Step 2: Convert to fraction form
    447.76/670.91 = 430.67/x
  3. Step 3: Cross multiply
    447.76x = 670.91 × 430.67
  4. Step 4: Simplify right side
    447.76x = 288,940.81
  5. Step 5: Solve for x
    x = 288,940.81/447.76
  6. Step 6: Final answer
    x = 645.30

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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.