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Finding the Fourth Proportional to 784.84, 1,181.59 and 679

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Solution

The fourth proportional to 784.84, 1,181.59 and 679 is: 1,022.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.84 : 1,181.59 = 679 : x
  2. Step 2: Convert to fraction form
    784.84/1,181.59 = 679/x
  3. Step 3: Cross multiply
    784.84x = 1,181.59 × 679
  4. Step 4: Simplify right side
    784.84x = 802,299.61
  5. Step 5: Solve for x
    x = 802,299.61/784.84
  6. Step 6: Final answer
    x = 1,022.25

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.