Home / 1,307.26-1,960.56-485.08

Finding the Fourth Proportional to 1,307.26, 1,960.56 and 485.08

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Solution

The fourth proportional to 1,307.26, 1,960.56 and 485.08 is: 727.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.26 : 1,960.56 = 485.08 : x
  2. Step 2: Convert to fraction form
    1,307.26/1,960.56 = 485.08/x
  3. Step 3: Cross multiply
    1,307.26x = 1,960.56 × 485.08
  4. Step 4: Simplify right side
    1,307.26x = 951,028.44
  5. Step 5: Solve for x
    x = 951,028.44/1,307.26
  6. Step 6: Final answer
    x = 727.50

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Double scale
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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.