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Finding the Fourth Proportional to 1,869.62, 2,803.74 and 1,127.41

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Solution

The fourth proportional to 1,869.62, 2,803.74 and 1,127.41 is: 1,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.62 : 2,803.74 = 1,127.41 : x
  2. Step 2: Convert to fraction form
    1,869.62/2,803.74 = 1,127.41/x
  3. Step 3: Cross multiply
    1,869.62x = 2,803.74 × 1,127.41
  4. Step 4: Simplify right side
    1,869.62x = 3,160,953.28
  5. Step 5: Solve for x
    x = 3,160,953.28/1,869.62
  6. Step 6: Final answer
    x = 1,690.70

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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.