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Finding the Fourth Proportional to 1,842.12, 2,762.90 and 543.48

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Solution

The fourth proportional to 1,842.12, 2,762.90 and 543.48 is: 815.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.12 : 2,762.90 = 543.48 : x
  2. Step 2: Convert to fraction form
    1,842.12/2,762.90 = 543.48/x
  3. Step 3: Cross multiply
    1,842.12x = 2,762.90 × 543.48
  4. Step 4: Simplify right side
    1,842.12x = 1,501,580.89
  5. Step 5: Solve for x
    x = 1,501,580.89/1,842.12
  6. Step 6: Final answer
    x = 815.14

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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.