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Finding the Fourth Proportional to 1,255.05, 1,731.81 and 835.86

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Solution

The fourth proportional to 1,255.05, 1,731.81 and 835.86 is: 1,153.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.05 : 1,731.81 = 835.86 : x
  2. Step 2: Convert to fraction form
    1,255.05/1,731.81 = 835.86/x
  3. Step 3: Cross multiply
    1,255.05x = 1,731.81 × 835.86
  4. Step 4: Simplify right side
    1,255.05x = 1,447,550.71
  5. Step 5: Solve for x
    x = 1,447,550.71/1,255.05
  6. Step 6: Final answer
    x = 1,153.38

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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.