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Finding the Fourth Proportional to 1,525.87, 2,288.87 and 430.33

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Solution

The fourth proportional to 1,525.87, 2,288.87 and 430.33 is: 645.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,525.87 : 2,288.87 = 430.33 : x
  2. Step 2: Convert to fraction form
    1,525.87/2,288.87 = 430.33/x
  3. Step 3: Cross multiply
    1,525.87x = 2,288.87 × 430.33
  4. Step 4: Simplify right side
    1,525.87x = 984,969.43
  5. Step 5: Solve for x
    x = 984,969.43/1,525.87
  6. Step 6: Final answer
    x = 645.51

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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.