Home / 3,915.25-5,872.86-1,320.01

Finding the Fourth Proportional to 3,915.25, 5,872.86 and 1,320.01

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Solution

The fourth proportional to 3,915.25, 5,872.86 and 1,320.01 is: 1,980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.25 : 5,872.86 = 1,320.01 : x
  2. Step 2: Convert to fraction form
    3,915.25/5,872.86 = 1,320.01/x
  3. Step 3: Cross multiply
    3,915.25x = 5,872.86 × 1,320.01
  4. Step 4: Simplify right side
    3,915.25x = 7,752,219.25
  5. Step 5: Solve for x
    x = 7,752,219.25/3,915.25
  6. Step 6: Final answer
    x = 1,980.01

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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.