Home / 1,396.30-2,090.40-848.20

Finding the Fourth Proportional to 1,396.30, 2,090.40 and 848.20

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Solution

The fourth proportional to 1,396.30, 2,090.40 and 848.20 is: 1,269.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.30 : 2,090.40 = 848.20 : x
  2. Step 2: Convert to fraction form
    1,396.30/2,090.40 = 848.20/x
  3. Step 3: Cross multiply
    1,396.30x = 2,090.40 × 848.20
  4. Step 4: Simplify right side
    1,396.30x = 1,773,077.28
  5. Step 5: Solve for x
    x = 1,773,077.28/1,396.30
  6. Step 6: Final answer
    x = 1,269.84

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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.