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Finding the Fourth Proportional to 696.95, 958.23 and 621.57

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Solution

The fourth proportional to 696.95, 958.23 and 621.57 is: 854.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.95 : 958.23 = 621.57 : x
  2. Step 2: Convert to fraction form
    696.95/958.23 = 621.57/x
  3. Step 3: Cross multiply
    696.95x = 958.23 × 621.57
  4. Step 4: Simplify right side
    696.95x = 595,607.02
  5. Step 5: Solve for x
    x = 595,607.02/696.95
  6. Step 6: Final answer
    x = 854.60

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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.