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Finding the Fourth Proportional to 432.45, 647.70 and 310.33

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Solution

The fourth proportional to 432.45, 647.70 and 310.33 is: 464.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.45 : 647.70 = 310.33 : x
  2. Step 2: Convert to fraction form
    432.45/647.70 = 310.33/x
  3. Step 3: Cross multiply
    432.45x = 647.70 × 310.33
  4. Step 4: Simplify right side
    432.45x = 201,000.74
  5. Step 5: Solve for x
    x = 201,000.74/432.45
  6. Step 6: Final answer
    x = 464.80

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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.