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Finding the Fourth Proportional to 1,872.22, 2,807.10 and 1,214.50

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Solution

The fourth proportional to 1,872.22, 2,807.10 and 1,214.50 is: 1,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.22 : 2,807.10 = 1,214.50 : x
  2. Step 2: Convert to fraction form
    1,872.22/2,807.10 = 1,214.50/x
  3. Step 3: Cross multiply
    1,872.22x = 2,807.10 × 1,214.50
  4. Step 4: Simplify right side
    1,872.22x = 3,409,222.95
  5. Step 5: Solve for x
    x = 3,409,222.95/1,872.22
  6. Step 6: Final answer
    x = 1,820.95

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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.