Home / 1,529.81-2,111.16-831.18

Finding the Fourth Proportional to 1,529.81, 2,111.16 and 831.18

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Solution

The fourth proportional to 1,529.81, 2,111.16 and 831.18 is: 1,147.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.81 : 2,111.16 = 831.18 : x
  2. Step 2: Convert to fraction form
    1,529.81/2,111.16 = 831.18/x
  3. Step 3: Cross multiply
    1,529.81x = 2,111.16 × 831.18
  4. Step 4: Simplify right side
    1,529.81x = 1,754,753.97
  5. Step 5: Solve for x
    x = 1,754,753.97/1,529.81
  6. Step 6: Final answer
    x = 1,147.04

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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.