Home / 1,188.09-1,639.89-1,106.07

Finding the Fourth Proportional to 1,188.09, 1,639.89 and 1,106.07

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Solution

The fourth proportional to 1,188.09, 1,639.89 and 1,106.07 is: 1,526.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.09 : 1,639.89 = 1,106.07 : x
  2. Step 2: Convert to fraction form
    1,188.09/1,639.89 = 1,106.07/x
  3. Step 3: Cross multiply
    1,188.09x = 1,639.89 × 1,106.07
  4. Step 4: Simplify right side
    1,188.09x = 1,813,833.13
  5. Step 5: Solve for x
    x = 1,813,833.13/1,188.09
  6. Step 6: Final answer
    x = 1,526.68

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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.