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Finding the Fourth Proportional to 1,573.88, 2,172.02 and 875.25

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Solution

The fourth proportional to 1,573.88, 2,172.02 and 875.25 is: 1,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.88 : 2,172.02 = 875.25 : x
  2. Step 2: Convert to fraction form
    1,573.88/2,172.02 = 875.25/x
  3. Step 3: Cross multiply
    1,573.88x = 2,172.02 × 875.25
  4. Step 4: Simplify right side
    1,573.88x = 1,901,056.13
  5. Step 5: Solve for x
    x = 1,901,056.13/1,573.88
  6. Step 6: Final answer
    x = 1,207.88

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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.