Home / 2,880.78-4,320.60-1,320.36

Finding the Fourth Proportional to 2,880.78, 4,320.60 and 1,320.36

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Solution

The fourth proportional to 2,880.78, 4,320.60 and 1,320.36 is: 1,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.78 : 4,320.60 = 1,320.36 : x
  2. Step 2: Convert to fraction form
    2,880.78/4,320.60 = 1,320.36/x
  3. Step 3: Cross multiply
    2,880.78x = 4,320.60 × 1,320.36
  4. Step 4: Simplify right side
    2,880.78x = 5,704,747.42
  5. Step 5: Solve for x
    x = 5,704,747.42/2,880.78
  6. Step 6: Final answer
    x = 1,980.28

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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.