Home / 1,138.06-1,573.60-1,085.50

Finding the Fourth Proportional to 1,138.06, 1,573.60 and 1,085.50

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Solution

The fourth proportional to 1,138.06, 1,573.60 and 1,085.50 is: 1,500.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.06 : 1,573.60 = 1,085.50 : x
  2. Step 2: Convert to fraction form
    1,138.06/1,573.60 = 1,085.50/x
  3. Step 3: Cross multiply
    1,138.06x = 1,573.60 × 1,085.50
  4. Step 4: Simplify right side
    1,138.06x = 1,708,142.80
  5. Step 5: Solve for x
    x = 1,708,142.80/1,138.06
  6. Step 6: Final answer
    x = 1,500.93

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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.