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Finding the Fourth Proportional to 2,415.76, 3,333.74 and 1,311.76

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Solution

The fourth proportional to 2,415.76, 3,333.74 and 1,311.76 is: 1,810.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.76 : 3,333.74 = 1,311.76 : x
  2. Step 2: Convert to fraction form
    2,415.76/3,333.74 = 1,311.76/x
  3. Step 3: Cross multiply
    2,415.76x = 3,333.74 × 1,311.76
  4. Step 4: Simplify right side
    2,415.76x = 4,373,066.78
  5. Step 5: Solve for x
    x = 4,373,066.78/2,415.76
  6. Step 6: Final answer
    x = 1,810.22

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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.