Home / 1,669.36-2,503.68-515.12

Finding the Fourth Proportional to 1,669.36, 2,503.68 and 515.12

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Solution

The fourth proportional to 1,669.36, 2,503.68 and 515.12 is: 772.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669.36 : 2,503.68 = 515.12 : x
  2. Step 2: Convert to fraction form
    1,669.36/2,503.68 = 515.12/x
  3. Step 3: Cross multiply
    1,669.36x = 2,503.68 × 515.12
  4. Step 4: Simplify right side
    1,669.36x = 1,289,695.64
  5. Step 5: Solve for x
    x = 1,289,695.64/1,669.36
  6. Step 6: Final answer
    x = 772.57

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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.