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Finding the Fourth Proportional to 1,453.98, 2,180.68 and 620.89

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Solution

The fourth proportional to 1,453.98, 2,180.68 and 620.89 is: 931.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.98 : 2,180.68 = 620.89 : x
  2. Step 2: Convert to fraction form
    1,453.98/2,180.68 = 620.89/x
  3. Step 3: Cross multiply
    1,453.98x = 2,180.68 × 620.89
  4. Step 4: Simplify right side
    1,453.98x = 1,353,962.41
  5. Step 5: Solve for x
    x = 1,353,962.41/1,453.98
  6. Step 6: Final answer
    x = 931.21

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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.