Home / 1,717.20-2,381.40-1,636.20

Finding the Fourth Proportional to 1,717.20, 2,381.40 and 1,636.20

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Solution

The fourth proportional to 1,717.20, 2,381.40 and 1,636.20 is: 2,269.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.20 : 2,381.40 = 1,636.20 : x
  2. Step 2: Convert to fraction form
    1,717.20/2,381.40 = 1,636.20/x
  3. Step 3: Cross multiply
    1,717.20x = 2,381.40 × 1,636.20
  4. Step 4: Simplify right side
    1,717.20x = 3,896,446.68
  5. Step 5: Solve for x
    x = 3,896,446.68/1,717.20
  6. Step 6: Final answer
    x = 2,269.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.