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Finding the Fourth Proportional to 770.98, 1,156.47 and 223.16

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Solution

The fourth proportional to 770.98, 1,156.47 and 223.16 is: 334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.98 : 1,156.47 = 223.16 : x
  2. Step 2: Convert to fraction form
    770.98/1,156.47 = 223.16/x
  3. Step 3: Cross multiply
    770.98x = 1,156.47 × 223.16
  4. Step 4: Simplify right side
    770.98x = 258,078.51
  5. Step 5: Solve for x
    x = 258,078.51/770.98
  6. Step 6: Final answer
    x = 334.74

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Double scale
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Similar ratio
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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.