Home / 2,390.40-3,582.36-1,072.80

Finding the Fourth Proportional to 2,390.40, 3,582.36 and 1,072.80

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Solution

The fourth proportional to 2,390.40, 3,582.36 and 1,072.80 is: 1,607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.40 : 3,582.36 = 1,072.80 : x
  2. Step 2: Convert to fraction form
    2,390.40/3,582.36 = 1,072.80/x
  3. Step 3: Cross multiply
    2,390.40x = 3,582.36 × 1,072.80
  4. Step 4: Simplify right side
    2,390.40x = 3,843,155.81
  5. Step 5: Solve for x
    x = 3,843,155.81/2,390.40
  6. Step 6: Final answer
    x = 1,607.75

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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.