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Finding the Fourth Proportional to 1,947.89, 2,919.06 and 974.67

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Solution

The fourth proportional to 1,947.89, 2,919.06 and 974.67 is: 1,460.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.89 : 2,919.06 = 974.67 : x
  2. Step 2: Convert to fraction form
    1,947.89/2,919.06 = 974.67/x
  3. Step 3: Cross multiply
    1,947.89x = 2,919.06 × 974.67
  4. Step 4: Simplify right side
    1,947.89x = 2,845,120.21
  5. Step 5: Solve for x
    x = 2,845,120.21/1,947.89
  6. Step 6: Final answer
    x = 1,460.62

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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.