Home / 1,880.40-2,815.02-1,395.60

Finding the Fourth Proportional to 1,880.40, 2,815.02 and 1,395.60

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Solution

The fourth proportional to 1,880.40, 2,815.02 and 1,395.60 is: 2,089.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,880.40 : 2,815.02 = 1,395.60 : x
  2. Step 2: Convert to fraction form
    1,880.40/2,815.02 = 1,395.60/x
  3. Step 3: Cross multiply
    1,880.40x = 2,815.02 × 1,395.60
  4. Step 4: Simplify right side
    1,880.40x = 3,928,641.91
  5. Step 5: Solve for x
    x = 3,928,641.91/1,880.40
  6. Step 6: Final answer
    x = 2,089.26

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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.