Home / 1,320.34-1,982.56-1,261.90

Finding the Fourth Proportional to 1,320.34, 1,982.56 and 1,261.90

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Solution

The fourth proportional to 1,320.34, 1,982.56 and 1,261.90 is: 1,894.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.34 : 1,982.56 = 1,261.90 : x
  2. Step 2: Convert to fraction form
    1,320.34/1,982.56 = 1,261.90/x
  3. Step 3: Cross multiply
    1,320.34x = 1,982.56 × 1,261.90
  4. Step 4: Simplify right side
    1,320.34x = 2,501,792.46
  5. Step 5: Solve for x
    x = 2,501,792.46/1,320.34
  6. Step 6: Final answer
    x = 1,894.81

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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.