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Finding the Fourth Proportional to 482.45, 665.74 and 285.93

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Solution

The fourth proportional to 482.45, 665.74 and 285.93 is: 394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.45 : 665.74 = 285.93 : x
  2. Step 2: Convert to fraction form
    482.45/665.74 = 285.93/x
  3. Step 3: Cross multiply
    482.45x = 665.74 × 285.93
  4. Step 4: Simplify right side
    482.45x = 190,350.28
  5. Step 5: Solve for x
    x = 190,350.28/482.45
  6. Step 6: Final answer
    x = 394.55

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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.