Home / 1,401.28-2,114.58-1,390.48

Finding the Fourth Proportional to 1,401.28, 2,114.58 and 1,390.48

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Solution

The fourth proportional to 1,401.28, 2,114.58 and 1,390.48 is: 2,098.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.28 : 2,114.58 = 1,390.48 : x
  2. Step 2: Convert to fraction form
    1,401.28/2,114.58 = 1,390.48/x
  3. Step 3: Cross multiply
    1,401.28x = 2,114.58 × 1,390.48
  4. Step 4: Simplify right side
    1,401.28x = 2,940,281.20
  5. Step 5: Solve for x
    x = 2,940,281.20/1,401.28
  6. Step 6: Final answer
    x = 2,098.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.