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Finding the Fourth Proportional to 699.73, 970.05 and 662.74

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Solution

The fourth proportional to 699.73, 970.05 and 662.74 is: 918.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.73 : 970.05 = 662.74 : x
  2. Step 2: Convert to fraction form
    699.73/970.05 = 662.74/x
  3. Step 3: Cross multiply
    699.73x = 970.05 × 662.74
  4. Step 4: Simplify right side
    699.73x = 642,890.94
  5. Step 5: Solve for x
    x = 642,890.94/699.73
  6. Step 6: Final answer
    x = 918.77

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.