Home / 1,306.23-1,960.12-485.08

Finding the Fourth Proportional to 1,306.23, 1,960.12 and 485.08

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Solution

The fourth proportional to 1,306.23, 1,960.12 and 485.08 is: 727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.23 : 1,960.12 = 485.08 : x
  2. Step 2: Convert to fraction form
    1,306.23/1,960.12 = 485.08/x
  3. Step 3: Cross multiply
    1,306.23x = 1,960.12 × 485.08
  4. Step 4: Simplify right side
    1,306.23x = 950,802.78
  5. Step 5: Solve for x
    x = 950,802.78/1,306.23
  6. Step 6: Final answer
    x = 727.90

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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.