Home / 1,717.16-2,369.67-931.21

Finding the Fourth Proportional to 1,717.16, 2,369.67 and 931.21

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Solution

The fourth proportional to 1,717.16, 2,369.67 and 931.21 is: 1,285.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.16 : 2,369.67 = 931.21 : x
  2. Step 2: Convert to fraction form
    1,717.16/2,369.67 = 931.21/x
  3. Step 3: Cross multiply
    1,717.16x = 2,369.67 × 931.21
  4. Step 4: Simplify right side
    1,717.16x = 2,206,660.40
  5. Step 5: Solve for x
    x = 2,206,660.40/1,717.16
  6. Step 6: Final answer
    x = 1,285.06

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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.