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Finding the Fourth Proportional to 699.07, 960.67 and 666.95

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Solution

The fourth proportional to 699.07, 960.67 and 666.95 is: 916.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.07 : 960.67 = 666.95 : x
  2. Step 2: Convert to fraction form
    699.07/960.67 = 666.95/x
  3. Step 3: Cross multiply
    699.07x = 960.67 × 666.95
  4. Step 4: Simplify right side
    699.07x = 640,717.19
  5. Step 5: Solve for x
    x = 640,717.19/699.07
  6. Step 6: Final answer
    x = 916.53

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.