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Finding the Fourth Proportional to 722.75, 997.77 and 679.55

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Solution

The fourth proportional to 722.75, 997.77 and 679.55 is: 938.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.75 : 997.77 = 679.55 : x
  2. Step 2: Convert to fraction form
    722.75/997.77 = 679.55/x
  3. Step 3: Cross multiply
    722.75x = 997.77 × 679.55
  4. Step 4: Simplify right side
    722.75x = 678,034.60
  5. Step 5: Solve for x
    x = 678,034.60/722.75
  6. Step 6: Final answer
    x = 938.13

Related Problems

Find fourth proportional to 361.38, 498.89 and 339.78
Half scale
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Double scale
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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.