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Finding the Fourth Proportional to 770.96, 1,156.20 and 223.18

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Solution

The fourth proportional to 770.96, 1,156.20 and 223.18 is: 334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.96 : 1,156.20 = 223.18 : x
  2. Step 2: Convert to fraction form
    770.96/1,156.20 = 223.18/x
  3. Step 3: Cross multiply
    770.96x = 1,156.20 × 223.18
  4. Step 4: Simplify right side
    770.96x = 258,040.72
  5. Step 5: Solve for x
    x = 258,040.72/770.96
  6. Step 6: Final answer
    x = 334.70

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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.