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Finding the Fourth Proportional to 587.21, 880.11 and 430.79

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Solution

The fourth proportional to 587.21, 880.11 and 430.79 is: 645.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.21 : 880.11 = 430.79 : x
  2. Step 2: Convert to fraction form
    587.21/880.11 = 430.79/x
  3. Step 3: Cross multiply
    587.21x = 880.11 × 430.79
  4. Step 4: Simplify right side
    587.21x = 379,138.19
  5. Step 5: Solve for x
    x = 379,138.19/587.21
  6. Step 6: Final answer
    x = 645.67

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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.