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Finding the Fourth Proportional to 1,926.72, 2,890.80 and 628.20

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Solution

The fourth proportional to 1,926.72, 2,890.80 and 628.20 is: 942.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,926.72 : 2,890.80 = 628.20 : x
  2. Step 2: Convert to fraction form
    1,926.72/2,890.80 = 628.20/x
  3. Step 3: Cross multiply
    1,926.72x = 2,890.80 × 628.20
  4. Step 4: Simplify right side
    1,926.72x = 1,816,000.56
  5. Step 5: Solve for x
    x = 1,816,000.56/1,926.72
  6. Step 6: Final answer
    x = 942.53

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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.