Home / 1,112.37-1,535.54-1,042.40

Finding the Fourth Proportional to 1,112.37, 1,535.54 and 1,042.40

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Solution

The fourth proportional to 1,112.37, 1,535.54 and 1,042.40 is: 1,438.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.37 : 1,535.54 = 1,042.40 : x
  2. Step 2: Convert to fraction form
    1,112.37/1,535.54 = 1,042.40/x
  3. Step 3: Cross multiply
    1,112.37x = 1,535.54 × 1,042.40
  4. Step 4: Simplify right side
    1,112.37x = 1,600,646.90
  5. Step 5: Solve for x
    x = 1,600,646.90/1,112.37
  6. Step 6: Final answer
    x = 1,438.95

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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.