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Finding the Fourth Proportional to 3,459.64, 5,189.47 and 862.58

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Solution

The fourth proportional to 3,459.64, 5,189.47 and 862.58 is: 1,293.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,459.64 : 5,189.47 = 862.58 : x
  2. Step 2: Convert to fraction form
    3,459.64/5,189.47 = 862.58/x
  3. Step 3: Cross multiply
    3,459.64x = 5,189.47 × 862.58
  4. Step 4: Simplify right side
    3,459.64x = 4,476,333.03
  5. Step 5: Solve for x
    x = 4,476,333.03/3,459.64
  6. Step 6: Final answer
    x = 1,293.87

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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.