Home / 1,528.70-2,290.80-1,205.78

Finding the Fourth Proportional to 1,528.70, 2,290.80 and 1,205.78

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Solution

The fourth proportional to 1,528.70, 2,290.80 and 1,205.78 is: 1,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.70 : 2,290.80 = 1,205.78 : x
  2. Step 2: Convert to fraction form
    1,528.70/2,290.80 = 1,205.78/x
  3. Step 3: Cross multiply
    1,528.70x = 2,290.80 × 1,205.78
  4. Step 4: Simplify right side
    1,528.70x = 2,762,200.82
  5. Step 5: Solve for x
    x = 2,762,200.82/1,528.70
  6. Step 6: Final answer
    x = 1,806.90

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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.