Home / 1,276.11-1,915.20-659.99

Finding the Fourth Proportional to 1,276.11, 1,915.20 and 659.99

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Solution

The fourth proportional to 1,276.11, 1,915.20 and 659.99 is: 990.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.11 : 1,915.20 = 659.99 : x
  2. Step 2: Convert to fraction form
    1,276.11/1,915.20 = 659.99/x
  3. Step 3: Cross multiply
    1,276.11x = 1,915.20 × 659.99
  4. Step 4: Simplify right side
    1,276.11x = 1,264,016.75
  5. Step 5: Solve for x
    x = 1,264,016.75/1,276.11
  6. Step 6: Final answer
    x = 990.52

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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.