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Finding the Fourth Proportional to 452.20, 620.57 and 423.40

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Solution

The fourth proportional to 452.20, 620.57 and 423.40 is: 581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.20 : 620.57 = 423.40 : x
  2. Step 2: Convert to fraction form
    452.20/620.57 = 423.40/x
  3. Step 3: Cross multiply
    452.20x = 620.57 × 423.40
  4. Step 4: Simplify right side
    452.20x = 262,749.34
  5. Step 5: Solve for x
    x = 262,749.34/452.20
  6. Step 6: Final answer
    x = 581.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.