Home / 1,188.79-1,639.37-1,056.05

Finding the Fourth Proportional to 1,188.79, 1,639.37 and 1,056.05

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Solution

The fourth proportional to 1,188.79, 1,639.37 and 1,056.05 is: 1,456.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.79 : 1,639.37 = 1,056.05 : x
  2. Step 2: Convert to fraction form
    1,188.79/1,639.37 = 1,056.05/x
  3. Step 3: Cross multiply
    1,188.79x = 1,639.37 × 1,056.05
  4. Step 4: Simplify right side
    1,188.79x = 1,731,257.28
  5. Step 5: Solve for x
    x = 1,731,257.28/1,188.79
  6. Step 6: Final answer
    x = 1,456.32

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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.