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Finding the Fourth Proportional to 1,927.38, 2,891.76 and 628.85

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Solution

The fourth proportional to 1,927.38, 2,891.76 and 628.85 is: 943.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,927.38 : 2,891.76 = 628.85 : x
  2. Step 2: Convert to fraction form
    1,927.38/2,891.76 = 628.85/x
  3. Step 3: Cross multiply
    1,927.38x = 2,891.76 × 628.85
  4. Step 4: Simplify right side
    1,927.38x = 1,818,483.28
  5. Step 5: Solve for x
    x = 1,818,483.28/1,927.38
  6. Step 6: Final answer
    x = 943.50

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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.