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Finding the Fourth Proportional to 1,172.56, 1,618.26 and 700.84

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Solution

The fourth proportional to 1,172.56, 1,618.26 and 700.84 is: 967.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.56 : 1,618.26 = 700.84 : x
  2. Step 2: Convert to fraction form
    1,172.56/1,618.26 = 700.84/x
  3. Step 3: Cross multiply
    1,172.56x = 1,618.26 × 700.84
  4. Step 4: Simplify right side
    1,172.56x = 1,134,141.34
  5. Step 5: Solve for x
    x = 1,134,141.34/1,172.56
  6. Step 6: Final answer
    x = 967.24

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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.