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Finding the Fourth Proportional to 3,455.07, 5,182.68 and 857.94

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Solution

The fourth proportional to 3,455.07, 5,182.68 and 857.94 is: 1,286.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.07 : 5,182.68 = 857.94 : x
  2. Step 2: Convert to fraction form
    3,455.07/5,182.68 = 857.94/x
  3. Step 3: Cross multiply
    3,455.07x = 5,182.68 × 857.94
  4. Step 4: Simplify right side
    3,455.07x = 4,446,424.19
  5. Step 5: Solve for x
    x = 4,446,424.19/3,455.07
  6. Step 6: Final answer
    x = 1,286.93

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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.