Home / 1,904.70-2,857.05-1,248.60

Finding the Fourth Proportional to 1,904.70, 2,857.05 and 1,248.60

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Solution

The fourth proportional to 1,904.70, 2,857.05 and 1,248.60 is: 1,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.70 : 2,857.05 = 1,248.60 : x
  2. Step 2: Convert to fraction form
    1,904.70/2,857.05 = 1,248.60/x
  3. Step 3: Cross multiply
    1,904.70x = 2,857.05 × 1,248.60
  4. Step 4: Simplify right side
    1,904.70x = 3,567,312.63
  5. Step 5: Solve for x
    x = 3,567,312.63/1,904.70
  6. Step 6: Final answer
    x = 1,872.90

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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.