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Finding the Fourth Proportional to 628.70, 943.05 and 575.90

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Solution

The fourth proportional to 628.70, 943.05 and 575.90 is: 863.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.70 : 943.05 = 575.90 : x
  2. Step 2: Convert to fraction form
    628.70/943.05 = 575.90/x
  3. Step 3: Cross multiply
    628.70x = 943.05 × 575.90
  4. Step 4: Simplify right side
    628.70x = 543,102.50
  5. Step 5: Solve for x
    x = 543,102.50/628.70
  6. Step 6: Final answer
    x = 863.85

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Double scale
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Similar ratio
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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.