Home / 1,390.14-1,915.83-1,035.90

Finding the Fourth Proportional to 1,390.14, 1,915.83 and 1,035.90

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Solution

The fourth proportional to 1,390.14, 1,915.83 and 1,035.90 is: 1,427.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.14 : 1,915.83 = 1,035.90 : x
  2. Step 2: Convert to fraction form
    1,390.14/1,915.83 = 1,035.90/x
  3. Step 3: Cross multiply
    1,390.14x = 1,915.83 × 1,035.90
  4. Step 4: Simplify right side
    1,390.14x = 1,984,608.30
  5. Step 5: Solve for x
    x = 1,984,608.30/1,390.14
  6. Step 6: Final answer
    x = 1,427.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.