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Finding the Fourth Proportional to 483.11, 666.51 and 283.91

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Solution

The fourth proportional to 483.11, 666.51 and 283.91 is: 391.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.11 : 666.51 = 283.91 : x
  2. Step 2: Convert to fraction form
    483.11/666.51 = 283.91/x
  3. Step 3: Cross multiply
    483.11x = 666.51 × 283.91
  4. Step 4: Simplify right side
    483.11x = 189,224.46
  5. Step 5: Solve for x
    x = 189,224.46/483.11
  6. Step 6: Final answer
    x = 391.68

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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.