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Finding the Fourth Proportional to 2,981.84, 4,114.74 and 1,722.80

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Solution

The fourth proportional to 2,981.84, 4,114.74 and 1,722.80 is: 2,377.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.84 : 4,114.74 = 1,722.80 : x
  2. Step 2: Convert to fraction form
    2,981.84/4,114.74 = 1,722.80/x
  3. Step 3: Cross multiply
    2,981.84x = 4,114.74 × 1,722.80
  4. Step 4: Simplify right side
    2,981.84x = 7,088,874.07
  5. Step 5: Solve for x
    x = 7,088,874.07/2,981.84
  6. Step 6: Final answer
    x = 2,377.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.