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Finding the Fourth Proportional to 628.70, 938.01 and 559.40

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Solution

The fourth proportional to 628.70, 938.01 and 559.40 is: 834.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.70 : 938.01 = 559.40 : x
  2. Step 2: Convert to fraction form
    628.70/938.01 = 559.40/x
  3. Step 3: Cross multiply
    628.70x = 938.01 × 559.40
  4. Step 4: Simplify right side
    628.70x = 524,720.00
  5. Step 5: Solve for x
    x = 524,720.00/628.70
  6. Step 6: Final answer
    x = 834.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.