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Finding the Fourth Proportional to 837.44, 1,256.17 and 260.31

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Solution

The fourth proportional to 837.44, 1,256.17 and 260.31 is: 390.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.44 : 1,256.17 = 260.31 : x
  2. Step 2: Convert to fraction form
    837.44/1,256.17 = 260.31/x
  3. Step 3: Cross multiply
    837.44x = 1,256.17 × 260.31
  4. Step 4: Simplify right side
    837.44x = 326,993.61
  5. Step 5: Solve for x
    x = 326,993.61/837.44
  6. Step 6: Final answer
    x = 390.47

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1.5x scale

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.