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Finding the Fourth Proportional to 283.58, 390.60 and 239.84

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Solution

The fourth proportional to 283.58, 390.60 and 239.84 is: 330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.58 : 390.60 = 239.84 : x
  2. Step 2: Convert to fraction form
    283.58/390.60 = 239.84/x
  3. Step 3: Cross multiply
    283.58x = 390.60 × 239.84
  4. Step 4: Simplify right side
    283.58x = 93,681.50
  5. Step 5: Solve for x
    x = 93,681.50/283.58
  6. Step 6: Final answer
    x = 330.35

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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.