Home / 1,020.03-1,528.20-711.28

Finding the Fourth Proportional to 1,020.03, 1,528.20 and 711.28

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Solution

The fourth proportional to 1,020.03, 1,528.20 and 711.28 is: 1,065.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.03 : 1,528.20 = 711.28 : x
  2. Step 2: Convert to fraction form
    1,020.03/1,528.20 = 711.28/x
  3. Step 3: Cross multiply
    1,020.03x = 1,528.20 × 711.28
  4. Step 4: Simplify right side
    1,020.03x = 1,086,980.01
  5. Step 5: Solve for x
    x = 1,086,980.01/1,020.03
  6. Step 6: Final answer
    x = 1,065.64

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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.