Home / 1,445.40-2,169.54-1,390.14

Finding the Fourth Proportional to 1,445.40, 2,169.54 and 1,390.14

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Solution

The fourth proportional to 1,445.40, 2,169.54 and 1,390.14 is: 2,086.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.40 : 2,169.54 = 1,390.14 : x
  2. Step 2: Convert to fraction form
    1,445.40/2,169.54 = 1,390.14/x
  3. Step 3: Cross multiply
    1,445.40x = 2,169.54 × 1,390.14
  4. Step 4: Simplify right side
    1,445.40x = 3,015,964.34
  5. Step 5: Solve for x
    x = 3,015,964.34/1,445.40
  6. Step 6: Final answer
    x = 2,086.59

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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.