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Finding the Fourth Proportional to 656.21, 983.70 and 223.07

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Solution

The fourth proportional to 656.21, 983.70 and 223.07 is: 334.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.21 : 983.70 = 223.07 : x
  2. Step 2: Convert to fraction form
    656.21/983.70 = 223.07/x
  3. Step 3: Cross multiply
    656.21x = 983.70 × 223.07
  4. Step 4: Simplify right side
    656.21x = 219,433.96
  5. Step 5: Solve for x
    x = 219,433.96/656.21
  6. Step 6: Final answer
    x = 334.40

Related Problems

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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.