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Finding the Fourth Proportional to 1,574.52, 2,172.84 and 875.88

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Solution

The fourth proportional to 1,574.52, 2,172.84 and 875.88 is: 1,208.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.52 : 2,172.84 = 875.88 : x
  2. Step 2: Convert to fraction form
    1,574.52/2,172.84 = 875.88/x
  3. Step 3: Cross multiply
    1,574.52x = 2,172.84 × 875.88
  4. Step 4: Simplify right side
    1,574.52x = 1,903,147.10
  5. Step 5: Solve for x
    x = 1,903,147.10/1,574.52
  6. Step 6: Final answer
    x = 1,208.72

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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.