Home / 1,329.51-1,830.55-1,129.95

Finding the Fourth Proportional to 1,329.51, 1,830.55 and 1,129.95

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Solution

The fourth proportional to 1,329.51, 1,830.55 and 1,129.95 is: 1,555.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.51 : 1,830.55 = 1,129.95 : x
  2. Step 2: Convert to fraction form
    1,329.51/1,830.55 = 1,129.95/x
  3. Step 3: Cross multiply
    1,329.51x = 1,830.55 × 1,129.95
  4. Step 4: Simplify right side
    1,329.51x = 2,068,429.27
  5. Step 5: Solve for x
    x = 2,068,429.27/1,329.51
  6. Step 6: Final answer
    x = 1,555.78

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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.