Home / 1,376.91-1,904.58-1,155.51

Finding the Fourth Proportional to 1,376.91, 1,904.58 and 1,155.51

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Solution

The fourth proportional to 1,376.91, 1,904.58 and 1,155.51 is: 1,598.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.91 : 1,904.58 = 1,155.51 : x
  2. Step 2: Convert to fraction form
    1,376.91/1,904.58 = 1,155.51/x
  3. Step 3: Cross multiply
    1,376.91x = 1,904.58 × 1,155.51
  4. Step 4: Simplify right side
    1,376.91x = 2,200,761.24
  5. Step 5: Solve for x
    x = 2,200,761.24/1,376.91
  6. Step 6: Final answer
    x = 1,598.33

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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.