Home / 1,528.24-2,290.80-911.20

Finding the Fourth Proportional to 1,528.24, 2,290.80 and 911.20

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Solution

The fourth proportional to 1,528.24, 2,290.80 and 911.20 is: 1,365.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.24 : 2,290.80 = 911.20 : x
  2. Step 2: Convert to fraction form
    1,528.24/2,290.80 = 911.20/x
  3. Step 3: Cross multiply
    1,528.24x = 2,290.80 × 911.20
  4. Step 4: Simplify right side
    1,528.24x = 2,087,376.96
  5. Step 5: Solve for x
    x = 2,087,376.96/1,528.24
  6. Step 6: Final answer
    x = 1,365.87

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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.