Home / 1,133.12-1,686.16-1,089.36

Finding the Fourth Proportional to 1,133.12, 1,686.16 and 1,089.36

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Solution

The fourth proportional to 1,133.12, 1,686.16 and 1,089.36 is: 1,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.12 : 1,686.16 = 1,089.36 : x
  2. Step 2: Convert to fraction form
    1,133.12/1,686.16 = 1,089.36/x
  3. Step 3: Cross multiply
    1,133.12x = 1,686.16 × 1,089.36
  4. Step 4: Simplify right side
    1,133.12x = 1,836,835.26
  5. Step 5: Solve for x
    x = 1,836,835.26/1,133.12
  6. Step 6: Final answer
    x = 1,621.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.