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Finding the Fourth Proportional to 2,245.69, 3,368.97 and 1,320.76

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Solution

The fourth proportional to 2,245.69, 3,368.97 and 1,320.76 is: 1,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,245.69 : 3,368.97 = 1,320.76 : x
  2. Step 2: Convert to fraction form
    2,245.69/3,368.97 = 1,320.76/x
  3. Step 3: Cross multiply
    2,245.69x = 3,368.97 × 1,320.76
  4. Step 4: Simplify right side
    2,245.69x = 4,449,600.82
  5. Step 5: Solve for x
    x = 4,449,600.82/2,245.69
  6. Step 6: Final answer
    x = 1,981.40

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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.