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Finding the Fourth Proportional to 694.98, 1,037.40 and 644.22

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Solution

The fourth proportional to 694.98, 1,037.40 and 644.22 is: 961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.98 : 1,037.40 = 644.22 : x
  2. Step 2: Convert to fraction form
    694.98/1,037.40 = 644.22/x
  3. Step 3: Cross multiply
    694.98x = 1,037.40 × 644.22
  4. Step 4: Simplify right side
    694.98x = 668,313.83
  5. Step 5: Solve for x
    x = 668,313.83/694.98
  6. Step 6: Final answer
    x = 961.63

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.