Home / 1,390.15-1,914-1,179.88

Finding the Fourth Proportional to 1,390.15, 1,914 and 1,179.88

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Solution

The fourth proportional to 1,390.15, 1,914 and 1,179.88 is: 1,624.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.15 : 1,914 = 1,179.88 : x
  2. Step 2: Convert to fraction form
    1,390.15/1,914 = 1,179.88/x
  3. Step 3: Cross multiply
    1,390.15x = 1,914 × 1,179.88
  4. Step 4: Simplify right side
    1,390.15x = 2,258,290.32
  5. Step 5: Solve for x
    x = 2,258,290.32/1,390.15
  6. Step 6: Final answer
    x = 1,624.49

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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.