Home / 1,728.24-2,385.84-1,171.64

Finding the Fourth Proportional to 1,728.24, 2,385.84 and 1,171.64

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Solution

The fourth proportional to 1,728.24, 2,385.84 and 1,171.64 is: 1,617.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.24 : 2,385.84 = 1,171.64 : x
  2. Step 2: Convert to fraction form
    1,728.24/2,385.84 = 1,171.64/x
  3. Step 3: Cross multiply
    1,728.24x = 2,385.84 × 1,171.64
  4. Step 4: Simplify right side
    1,728.24x = 2,795,345.58
  5. Step 5: Solve for x
    x = 2,795,345.58/1,728.24
  6. Step 6: Final answer
    x = 1,617.45

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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.