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Finding the Fourth Proportional to 386.53, 578.54 and 283.79

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Solution

The fourth proportional to 386.53, 578.54 and 283.79 is: 424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.53 : 578.54 = 283.79 : x
  2. Step 2: Convert to fraction form
    386.53/578.54 = 283.79/x
  3. Step 3: Cross multiply
    386.53x = 578.54 × 283.79
  4. Step 4: Simplify right side
    386.53x = 164,183.51
  5. Step 5: Solve for x
    x = 164,183.51/386.53
  6. Step 6: Final answer
    x = 424.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.