Home / 1,904.76-2,857.68-1,211.40

Finding the Fourth Proportional to 1,904.76, 2,857.68 and 1,211.40

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Solution

The fourth proportional to 1,904.76, 2,857.68 and 1,211.40 is: 1,817.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.76 : 2,857.68 = 1,211.40 : x
  2. Step 2: Convert to fraction form
    1,904.76/2,857.68 = 1,211.40/x
  3. Step 3: Cross multiply
    1,904.76x = 2,857.68 × 1,211.40
  4. Step 4: Simplify right side
    1,904.76x = 3,461,793.55
  5. Step 5: Solve for x
    x = 3,461,793.55/1,904.76
  6. Step 6: Final answer
    x = 1,817.44

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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.