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Finding the Fourth Proportional to 1,292.88, 1,784.26 and 873.30

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Solution

The fourth proportional to 1,292.88, 1,784.26 and 873.30 is: 1,205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.88 : 1,784.26 = 873.30 : x
  2. Step 2: Convert to fraction form
    1,292.88/1,784.26 = 873.30/x
  3. Step 3: Cross multiply
    1,292.88x = 1,784.26 × 873.30
  4. Step 4: Simplify right side
    1,292.88x = 1,558,194.26
  5. Step 5: Solve for x
    x = 1,558,194.26/1,292.88
  6. Step 6: Final answer
    x = 1,205.21

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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.