Home / 1,911.69-2,639.12-1,125.99

Finding the Fourth Proportional to 1,911.69, 2,639.12 and 1,125.99

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Solution

The fourth proportional to 1,911.69, 2,639.12 and 1,125.99 is: 1,554.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.69 : 2,639.12 = 1,125.99 : x
  2. Step 2: Convert to fraction form
    1,911.69/2,639.12 = 1,125.99/x
  3. Step 3: Cross multiply
    1,911.69x = 2,639.12 × 1,125.99
  4. Step 4: Simplify right side
    1,911.69x = 2,971,617.10
  5. Step 5: Solve for x
    x = 2,971,617.10/1,911.69
  6. Step 6: Final answer
    x = 1,554.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.