Home / 1,245.63-1,868.45-379.95

Finding the Fourth Proportional to 1,245.63, 1,868.45 and 379.95

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Solution

The fourth proportional to 1,245.63, 1,868.45 and 379.95 is: 569.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.63 : 1,868.45 = 379.95 : x
  2. Step 2: Convert to fraction form
    1,245.63/1,868.45 = 379.95/x
  3. Step 3: Cross multiply
    1,245.63x = 1,868.45 × 379.95
  4. Step 4: Simplify right side
    1,245.63x = 709,917.58
  5. Step 5: Solve for x
    x = 709,917.58/1,245.63
  6. Step 6: Final answer
    x = 569.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.