Home / 1,551.70-2,320.80-1,388.35

Finding the Fourth Proportional to 1,551.70, 2,320.80 and 1,388.35

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Solution

The fourth proportional to 1,551.70, 2,320.80 and 1,388.35 is: 2,076.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.70 : 2,320.80 = 1,388.35 : x
  2. Step 2: Convert to fraction form
    1,551.70/2,320.80 = 1,388.35/x
  3. Step 3: Cross multiply
    1,551.70x = 2,320.80 × 1,388.35
  4. Step 4: Simplify right side
    1,551.70x = 3,222,082.68
  5. Step 5: Solve for x
    x = 3,222,082.68/1,551.70
  6. Step 6: Final answer
    x = 2,076.49

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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.