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Finding the Fourth Proportional to 628.45, 942.23 and 276.89

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Solution

The fourth proportional to 628.45, 942.23 and 276.89 is: 415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.45 : 942.23 = 276.89 : x
  2. Step 2: Convert to fraction form
    628.45/942.23 = 276.89/x
  3. Step 3: Cross multiply
    628.45x = 942.23 × 276.89
  4. Step 4: Simplify right side
    628.45x = 260,890.05
  5. Step 5: Solve for x
    x = 260,890.05/628.45
  6. Step 6: Final answer
    x = 415.13

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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.