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Finding the Fourth Proportional to 615.50, 848.48 and 449.45

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Solution

The fourth proportional to 615.50, 848.48 and 449.45 is: 619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.50 : 848.48 = 449.45 : x
  2. Step 2: Convert to fraction form
    615.50/848.48 = 449.45/x
  3. Step 3: Cross multiply
    615.50x = 848.48 × 449.45
  4. Step 4: Simplify right side
    615.50x = 381,346.03
  5. Step 5: Solve for x
    x = 381,346.03/615.50
  6. Step 6: Final answer
    x = 619.57

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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.