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Finding the Fourth Proportional to 283.42, 390.30 and 277.06

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Solution

The fourth proportional to 283.42, 390.30 and 277.06 is: 381.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.42 : 390.30 = 277.06 : x
  2. Step 2: Convert to fraction form
    283.42/390.30 = 277.06/x
  3. Step 3: Cross multiply
    283.42x = 390.30 × 277.06
  4. Step 4: Simplify right side
    283.42x = 108,136.52
  5. Step 5: Solve for x
    x = 108,136.52/283.42
  6. Step 6: Final answer
    x = 381.54

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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.