Home / 1,157.06-1,728.20-1,047.21

Finding the Fourth Proportional to 1,157.06, 1,728.20 and 1,047.21

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Solution

The fourth proportional to 1,157.06, 1,728.20 and 1,047.21 is: 1,564.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.06 : 1,728.20 = 1,047.21 : x
  2. Step 2: Convert to fraction form
    1,157.06/1,728.20 = 1,047.21/x
  3. Step 3: Cross multiply
    1,157.06x = 1,728.20 × 1,047.21
  4. Step 4: Simplify right side
    1,157.06x = 1,809,783.09
  5. Step 5: Solve for x
    x = 1,809,783.09/1,157.06
  6. Step 6: Final answer
    x = 1,564.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.