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Finding the Fourth Proportional to 486.08, 727.20 and 424.64

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Solution

The fourth proportional to 486.08, 727.20 and 424.64 is: 635.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.08 : 727.20 = 424.64 : x
  2. Step 2: Convert to fraction form
    486.08/727.20 = 424.64/x
  3. Step 3: Cross multiply
    486.08x = 727.20 × 424.64
  4. Step 4: Simplify right side
    486.08x = 308,798.21
  5. Step 5: Solve for x
    x = 308,798.21/486.08
  6. Step 6: Final answer
    x = 635.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.