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Finding the Fourth Proportional to 1,364.81, 2,047.40 and 543.17

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Solution

The fourth proportional to 1,364.81, 2,047.40 and 543.17 is: 814.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.81 : 2,047.40 = 543.17 : x
  2. Step 2: Convert to fraction form
    1,364.81/2,047.40 = 543.17/x
  3. Step 3: Cross multiply
    1,364.81x = 2,047.40 × 543.17
  4. Step 4: Simplify right side
    1,364.81x = 1,112,086.26
  5. Step 5: Solve for x
    x = 1,112,086.26/1,364.81
  6. Step 6: Final answer
    x = 814.83

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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.