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Finding the Fourth Proportional to 449.24, 619.74 and 384.44

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Solution

The fourth proportional to 449.24, 619.74 and 384.44 is: 530.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.24 : 619.74 = 384.44 : x
  2. Step 2: Convert to fraction form
    449.24/619.74 = 384.44/x
  3. Step 3: Cross multiply
    449.24x = 619.74 × 384.44
  4. Step 4: Simplify right side
    449.24x = 238,252.85
  5. Step 5: Solve for x
    x = 238,252.85/449.24
  6. Step 6: Final answer
    x = 530.35

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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.