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Finding the Fourth Proportional to 691.54, 953.80 and 504.97

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Solution

The fourth proportional to 691.54, 953.80 and 504.97 is: 696.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.54 : 953.80 = 504.97 : x
  2. Step 2: Convert to fraction form
    691.54/953.80 = 504.97/x
  3. Step 3: Cross multiply
    691.54x = 953.80 × 504.97
  4. Step 4: Simplify right side
    691.54x = 481,640.39
  5. Step 5: Solve for x
    x = 481,640.39/691.54
  6. Step 6: Final answer
    x = 696.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.