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Finding the Fourth Proportional to 1,192.58, 1,788.60 and 543.50

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Solution

The fourth proportional to 1,192.58, 1,788.60 and 543.50 is: 815.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.58 : 1,788.60 = 543.50 : x
  2. Step 2: Convert to fraction form
    1,192.58/1,788.60 = 543.50/x
  3. Step 3: Cross multiply
    1,192.58x = 1,788.60 × 543.50
  4. Step 4: Simplify right side
    1,192.58x = 972,104.10
  5. Step 5: Solve for x
    x = 972,104.10/1,192.58
  6. Step 6: Final answer
    x = 815.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.