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Finding the Fourth Proportional to 837.45, 1,256.44 and 317.43

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Solution

The fourth proportional to 837.45, 1,256.44 and 317.43 is: 476.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.45 : 1,256.44 = 317.43 : x
  2. Step 2: Convert to fraction form
    837.45/1,256.44 = 317.43/x
  3. Step 3: Cross multiply
    837.45x = 1,256.44 × 317.43
  4. Step 4: Simplify right side
    837.45x = 398,831.75
  5. Step 5: Solve for x
    x = 398,831.75/837.45
  6. Step 6: Final answer
    x = 476.25

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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.