Home / 1,307.31-1,961.01-485.13

Finding the Fourth Proportional to 1,307.31, 1,961.01 and 485.13

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Solution

The fourth proportional to 1,307.31, 1,961.01 and 485.13 is: 727.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.31 : 1,961.01 = 485.13 : x
  2. Step 2: Convert to fraction form
    1,307.31/1,961.01 = 485.13/x
  3. Step 3: Cross multiply
    1,307.31x = 1,961.01 × 485.13
  4. Step 4: Simplify right side
    1,307.31x = 951,344.78
  5. Step 5: Solve for x
    x = 951,344.78/1,307.31
  6. Step 6: Final answer
    x = 727.71

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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.