Home / 1,535.40-2,297.70-1,405.80

Finding the Fourth Proportional to 1,535.40, 2,297.70 and 1,405.80

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Solution

The fourth proportional to 1,535.40, 2,297.70 and 1,405.80 is: 2,103.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.40 : 2,297.70 = 1,405.80 : x
  2. Step 2: Convert to fraction form
    1,535.40/2,297.70 = 1,405.80/x
  3. Step 3: Cross multiply
    1,535.40x = 2,297.70 × 1,405.80
  4. Step 4: Simplify right side
    1,535.40x = 3,230,106.66
  5. Step 5: Solve for x
    x = 3,230,106.66/1,535.40
  6. Step 6: Final answer
    x = 2,103.76

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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.