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Finding the Fourth Proportional to 1,423.80, 2,135.22 and 546.26

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Solution

The fourth proportional to 1,423.80, 2,135.22 and 546.26 is: 819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.80 : 2,135.22 = 546.26 : x
  2. Step 2: Convert to fraction form
    1,423.80/2,135.22 = 546.26/x
  3. Step 3: Cross multiply
    1,423.80x = 2,135.22 × 546.26
  4. Step 4: Simplify right side
    1,423.80x = 1,166,374.60
  5. Step 5: Solve for x
    x = 1,166,374.60/1,423.80
  6. Step 6: Final answer
    x = 819.20

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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.