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Finding the Fourth Proportional to 449.87, 618.58 and 384.26

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Solution

The fourth proportional to 449.87, 618.58 and 384.26 is: 528.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.87 : 618.58 = 384.26 : x
  2. Step 2: Convert to fraction form
    449.87/618.58 = 384.26/x
  3. Step 3: Cross multiply
    449.87x = 618.58 × 384.26
  4. Step 4: Simplify right side
    449.87x = 237,695.55
  5. Step 5: Solve for x
    x = 237,695.55/449.87
  6. Step 6: Final answer
    x = 528.36

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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.