Home / 1,015.22-1,523.20-430.37

Finding the Fourth Proportional to 1,015.22, 1,523.20 and 430.37

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Solution

The fourth proportional to 1,015.22, 1,523.20 and 430.37 is: 645.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.22 : 1,523.20 = 430.37 : x
  2. Step 2: Convert to fraction form
    1,015.22/1,523.20 = 430.37/x
  3. Step 3: Cross multiply
    1,015.22x = 1,523.20 × 430.37
  4. Step 4: Simplify right side
    1,015.22x = 655,539.58
  5. Step 5: Solve for x
    x = 655,539.58/1,015.22
  6. Step 6: Final answer
    x = 645.71

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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.