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Finding the Fourth Proportional to 482.96, 666.36 and 286.40

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Solution

The fourth proportional to 482.96, 666.36 and 286.40 is: 395.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.96 : 666.36 = 286.40 : x
  2. Step 2: Convert to fraction form
    482.96/666.36 = 286.40/x
  3. Step 3: Cross multiply
    482.96x = 666.36 × 286.40
  4. Step 4: Simplify right side
    482.96x = 190,845.50
  5. Step 5: Solve for x
    x = 190,845.50/482.96
  6. Step 6: Final answer
    x = 395.16

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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.