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Finding the Fourth Proportional to 482.56, 666.08 and 286.16

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Solution

The fourth proportional to 482.56, 666.08 and 286.16 is: 394.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.56 : 666.08 = 286.16 : x
  2. Step 2: Convert to fraction form
    482.56/666.08 = 286.16/x
  3. Step 3: Cross multiply
    482.56x = 666.08 × 286.16
  4. Step 4: Simplify right side
    482.56x = 190,605.45
  5. Step 5: Solve for x
    x = 190,605.45/482.56
  6. Step 6: Final answer
    x = 394.99

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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.