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Finding the Fourth Proportional to 1,874.70, 2,809.60 and 949.76

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Solution

The fourth proportional to 1,874.70, 2,809.60 and 949.76 is: 1,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.70 : 2,809.60 = 949.76 : x
  2. Step 2: Convert to fraction form
    1,874.70/2,809.60 = 949.76/x
  3. Step 3: Cross multiply
    1,874.70x = 2,809.60 × 949.76
  4. Step 4: Simplify right side
    1,874.70x = 2,668,445.70
  5. Step 5: Solve for x
    x = 2,668,445.70/1,874.70
  6. Step 6: Final answer
    x = 1,423.40

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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.