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Finding the Fourth Proportional to 1,574.34, 2,172.60 and 875.73

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Solution

The fourth proportional to 1,574.34, 2,172.60 and 875.73 is: 1,208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.34 : 2,172.60 = 875.73 : x
  2. Step 2: Convert to fraction form
    1,574.34/2,172.60 = 875.73/x
  3. Step 3: Cross multiply
    1,574.34x = 2,172.60 × 875.73
  4. Step 4: Simplify right side
    1,574.34x = 1,902,611.00
  5. Step 5: Solve for x
    x = 1,902,611.00/1,574.34
  6. Step 6: Final answer
    x = 1,208.51

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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.