Home / 1,717.15-2,369.67-931.20

Finding the Fourth Proportional to 1,717.15, 2,369.67 and 931.20

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Solution

The fourth proportional to 1,717.15, 2,369.67 and 931.20 is: 1,285.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.15 : 2,369.67 = 931.20 : x
  2. Step 2: Convert to fraction form
    1,717.15/2,369.67 = 931.20/x
  3. Step 3: Cross multiply
    1,717.15x = 2,369.67 × 931.20
  4. Step 4: Simplify right side
    1,717.15x = 2,206,636.70
  5. Step 5: Solve for x
    x = 2,206,636.70/1,717.15
  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.