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Finding the Fourth Proportional to 770.79, 1,156.22 and 250.79

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Solution

The fourth proportional to 770.79, 1,156.22 and 250.79 is: 376.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.79 : 1,156.22 = 250.79 : x
  2. Step 2: Convert to fraction form
    770.79/1,156.22 = 250.79/x
  3. Step 3: Cross multiply
    770.79x = 1,156.22 × 250.79
  4. Step 4: Simplify right side
    770.79x = 289,961.38
  5. Step 5: Solve for x
    x = 289,961.38/770.79
  6. Step 6: Final answer
    x = 376.19

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.