Home / 1,112.38-1,535.43-1,075.90

Finding the Fourth Proportional to 1,112.38, 1,535.43 and 1,075.90

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Solution

The fourth proportional to 1,112.38, 1,535.43 and 1,075.90 is: 1,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.38 : 1,535.43 = 1,075.90 : x
  2. Step 2: Convert to fraction form
    1,112.38/1,535.43 = 1,075.90/x
  3. Step 3: Cross multiply
    1,112.38x = 1,535.43 × 1,075.90
  4. Step 4: Simplify right side
    1,112.38x = 1,651,969.14
  5. Step 5: Solve for x
    x = 1,651,969.14/1,112.38
  6. Step 6: Final answer
    x = 1,485.08

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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.