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Finding the Fourth Proportional to 482.78, 666.50 and 372.02

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Solution

The fourth proportional to 482.78, 666.50 and 372.02 is: 513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.78 : 666.50 = 372.02 : x
  2. Step 2: Convert to fraction form
    482.78/666.50 = 372.02/x
  3. Step 3: Cross multiply
    482.78x = 666.50 × 372.02
  4. Step 4: Simplify right side
    482.78x = 247,946.14
  5. Step 5: Solve for x
    x = 247,946.14/482.78
  6. Step 6: Final answer
    x = 513.58

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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.