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Finding the Fourth Proportional to 432.75, 647.51 and 269.67

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Solution

The fourth proportional to 432.75, 647.51 and 269.67 is: 403.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.75 : 647.51 = 269.67 : x
  2. Step 2: Convert to fraction form
    432.75/647.51 = 269.67/x
  3. Step 3: Cross multiply
    432.75x = 647.51 × 269.67
  4. Step 4: Simplify right side
    432.75x = 174,612.67
  5. Step 5: Solve for x
    x = 174,612.67/432.75
  6. Step 6: Final answer
    x = 403.50

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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.