Home / 2,289.11-3,159.35-1,728.70

Finding the Fourth Proportional to 2,289.11, 3,159.35 and 1,728.70

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Solution

The fourth proportional to 2,289.11, 3,159.35 and 1,728.70 is: 2,385.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.11 : 3,159.35 = 1,728.70 : x
  2. Step 2: Convert to fraction form
    2,289.11/3,159.35 = 1,728.70/x
  3. Step 3: Cross multiply
    2,289.11x = 3,159.35 × 1,728.70
  4. Step 4: Simplify right side
    2,289.11x = 5,461,568.35
  5. Step 5: Solve for x
    x = 5,461,568.35/2,289.11
  6. Step 6: Final answer
    x = 2,385.89

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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.