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Finding the Fourth Proportional to 449.55, 619.65 and 344.25

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Solution

The fourth proportional to 449.55, 619.65 and 344.25 is: 474.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.55 : 619.65 = 344.25 : x
  2. Step 2: Convert to fraction form
    449.55/619.65 = 344.25/x
  3. Step 3: Cross multiply
    449.55x = 619.65 × 344.25
  4. Step 4: Simplify right side
    449.55x = 213,314.51
  5. Step 5: Solve for x
    x = 213,314.51/449.55
  6. Step 6: Final answer
    x = 474.51

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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.