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Finding the Fourth Proportional to 615.44, 848.40 and 449.84

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Solution

The fourth proportional to 615.44, 848.40 and 449.84 is: 620.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.44 : 848.40 = 449.84 : x
  2. Step 2: Convert to fraction form
    615.44/848.40 = 449.84/x
  3. Step 3: Cross multiply
    615.44x = 848.40 × 449.84
  4. Step 4: Simplify right side
    615.44x = 381,644.26
  5. Step 5: Solve for x
    x = 381,644.26/615.44
  6. Step 6: Final answer
    x = 620.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.