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Finding the Fourth Proportional to 2,607.12, 3,910.35 and 659.28

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Solution

The fourth proportional to 2,607.12, 3,910.35 and 659.28 is: 988.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.12 : 3,910.35 = 659.28 : x
  2. Step 2: Convert to fraction form
    2,607.12/3,910.35 = 659.28/x
  3. Step 3: Cross multiply
    2,607.12x = 3,910.35 × 659.28
  4. Step 4: Simplify right side
    2,607.12x = 2,578,015.55
  5. Step 5: Solve for x
    x = 2,578,015.55/2,607.12
  6. Step 6: Final answer
    x = 988.84

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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.