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Finding the Fourth Proportional to 1,284.73, 1,927.80 and 699.70

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Solution

The fourth proportional to 1,284.73, 1,927.80 and 699.70 is: 1,049.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.73 : 1,927.80 = 699.70 : x
  2. Step 2: Convert to fraction form
    1,284.73/1,927.80 = 699.70/x
  3. Step 3: Cross multiply
    1,284.73x = 1,927.80 × 699.70
  4. Step 4: Simplify right side
    1,284.73x = 1,348,881.66
  5. Step 5: Solve for x
    x = 1,348,881.66/1,284.73
  6. Step 6: Final answer
    x = 1,049.93

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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.