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Finding the Fourth Proportional to 449.55, 619.95 and 263.05

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Solution

The fourth proportional to 449.55, 619.95 and 263.05 is: 362.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.55 : 619.95 = 263.05 : x
  2. Step 2: Convert to fraction form
    449.55/619.95 = 263.05/x
  3. Step 3: Cross multiply
    449.55x = 619.95 × 263.05
  4. Step 4: Simplify right side
    449.55x = 163,077.28
  5. Step 5: Solve for x
    x = 163,077.28/449.55
  6. Step 6: Final answer
    x = 362.76

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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.