Home / 1,315.49-1,969.72-1,159.79

Finding the Fourth Proportional to 1,315.49, 1,969.72 and 1,159.79

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Solution

The fourth proportional to 1,315.49, 1,969.72 and 1,159.79 is: 1,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.49 : 1,969.72 = 1,159.79 : x
  2. Step 2: Convert to fraction form
    1,315.49/1,969.72 = 1,159.79/x
  3. Step 3: Cross multiply
    1,315.49x = 1,969.72 × 1,159.79
  4. Step 4: Simplify right side
    1,315.49x = 2,284,448.81
  5. Step 5: Solve for x
    x = 2,284,448.81/1,315.49
  6. Step 6: Final answer
    x = 1,736.58

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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.