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Finding the Fourth Proportional to 283.33, 390.78 and 183.76

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Solution

The fourth proportional to 283.33, 390.78 and 183.76 is: 253.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.33 : 390.78 = 183.76 : x
  2. Step 2: Convert to fraction form
    283.33/390.78 = 183.76/x
  3. Step 3: Cross multiply
    283.33x = 390.78 × 183.76
  4. Step 4: Simplify right side
    283.33x = 71,809.73
  5. Step 5: Solve for x
    x = 71,809.73/283.33
  6. Step 6: Final answer
    x = 253.45

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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.