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Finding the Fourth Proportional to 693.45, 950.76 and 681.21

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Solution

The fourth proportional to 693.45, 950.76 and 681.21 is: 933.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.45 : 950.76 = 681.21 : x
  2. Step 2: Convert to fraction form
    693.45/950.76 = 681.21/x
  3. Step 3: Cross multiply
    693.45x = 950.76 × 681.21
  4. Step 4: Simplify right side
    693.45x = 647,667.22
  5. Step 5: Solve for x
    x = 647,667.22/693.45
  6. Step 6: Final answer
    x = 933.98

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1.5x scale

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.