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Finding the Fourth Proportional to 1,172.76, 1,606.80 and 1,157.37

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Solution

The fourth proportional to 1,172.76, 1,606.80 and 1,157.37 is: 1,585.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.76 : 1,606.80 = 1,157.37 : x
  2. Step 2: Convert to fraction form
    1,172.76/1,606.80 = 1,157.37/x
  3. Step 3: Cross multiply
    1,172.76x = 1,606.80 × 1,157.37
  4. Step 4: Simplify right side
    1,172.76x = 1,859,662.12
  5. Step 5: Solve for x
    x = 1,859,662.12/1,172.76
  6. Step 6: Final answer
    x = 1,585.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.