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Finding the Fourth Proportional to 1,505.44, 2,077.60 and 842.30

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Solution

The fourth proportional to 1,505.44, 2,077.60 and 842.30 is: 1,162.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.44 : 2,077.60 = 842.30 : x
  2. Step 2: Convert to fraction form
    1,505.44/2,077.60 = 842.30/x
  3. Step 3: Cross multiply
    1,505.44x = 2,077.60 × 842.30
  4. Step 4: Simplify right side
    1,505.44x = 1,749,959.36
  5. Step 5: Solve for x
    x = 1,749,959.36/1,505.44
  6. Step 6: Final answer
    x = 1,162.43

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1.5x scale

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.