Home / 1,408.04-2,102.31-1,320.56

Finding the Fourth Proportional to 1,408.04, 2,102.31 and 1,320.56

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Solution

The fourth proportional to 1,408.04, 2,102.31 and 1,320.56 is: 1,971.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.04 : 2,102.31 = 1,320.56 : x
  2. Step 2: Convert to fraction form
    1,408.04/2,102.31 = 1,320.56/x
  3. Step 3: Cross multiply
    1,408.04x = 2,102.31 × 1,320.56
  4. Step 4: Simplify right side
    1,408.04x = 2,776,219.89
  5. Step 5: Solve for x
    x = 2,776,219.89/1,408.04
  6. Step 6: Final answer
    x = 1,971.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.