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Finding the Fourth Proportional to 482.35, 665.08 and 456.40

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Solution

The fourth proportional to 482.35, 665.08 and 456.40 is: 629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.35 : 665.08 = 456.40 : x
  2. Step 2: Convert to fraction form
    482.35/665.08 = 456.40/x
  3. Step 3: Cross multiply
    482.35x = 665.08 × 456.40
  4. Step 4: Simplify right side
    482.35x = 303,542.51
  5. Step 5: Solve for x
    x = 303,542.51/482.35
  6. Step 6: Final answer
    x = 629.30

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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.