Home / 1,394.47-1,924.19-1,111.60

Finding the Fourth Proportional to 1,394.47, 1,924.19 and 1,111.60

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Solution

The fourth proportional to 1,394.47, 1,924.19 and 1,111.60 is: 1,533.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.47 : 1,924.19 = 1,111.60 : x
  2. Step 2: Convert to fraction form
    1,394.47/1,924.19 = 1,111.60/x
  3. Step 3: Cross multiply
    1,394.47x = 1,924.19 × 1,111.60
  4. Step 4: Simplify right side
    1,394.47x = 2,138,926.45
  5. Step 5: Solve for x
    x = 2,138,926.45/1,394.47
  6. Step 6: Final answer
    x = 1,533.86

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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.