Home / 3,455.12-5,182.86-858.08

Finding the Fourth Proportional to 3,455.12, 5,182.86 and 858.08

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Solution

The fourth proportional to 3,455.12, 5,182.86 and 858.08 is: 1,287.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.12 : 5,182.86 = 858.08 : x
  2. Step 2: Convert to fraction form
    3,455.12/5,182.86 = 858.08/x
  3. Step 3: Cross multiply
    3,455.12x = 5,182.86 × 858.08
  4. Step 4: Simplify right side
    3,455.12x = 4,447,308.51
  5. Step 5: Solve for x
    x = 4,447,308.51/3,455.12
  6. Step 6: Final answer
    x = 1,287.16

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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.