Home / 1,206.29-1,665.30-740.81

Finding the Fourth Proportional to 1,206.29, 1,665.30 and 740.81

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Solution

The fourth proportional to 1,206.29, 1,665.30 and 740.81 is: 1,022.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.29 : 1,665.30 = 740.81 : x
  2. Step 2: Convert to fraction form
    1,206.29/1,665.30 = 740.81/x
  3. Step 3: Cross multiply
    1,206.29x = 1,665.30 × 740.81
  4. Step 4: Simplify right side
    1,206.29x = 1,233,662.57
  5. Step 5: Solve for x
    x = 1,233,662.57/1,206.29
  6. Step 6: Final answer
    x = 1,022.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.