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Finding the Fourth Proportional to 452.70, 621.26 and 423.90

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Solution

The fourth proportional to 452.70, 621.26 and 423.90 is: 581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.70 : 621.26 = 423.90 : x
  2. Step 2: Convert to fraction form
    452.70/621.26 = 423.90/x
  3. Step 3: Cross multiply
    452.70x = 621.26 × 423.90
  4. Step 4: Simplify right side
    452.70x = 263,352.11
  5. Step 5: Solve for x
    x = 263,352.11/452.70
  6. Step 6: Final answer
    x = 581.74

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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.