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Finding the Fourth Proportional to 1,543.44, 2,316.56 and 813.56

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Solution

The fourth proportional to 1,543.44, 2,316.56 and 813.56 is: 1,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.44 : 2,316.56 = 813.56 : x
  2. Step 2: Convert to fraction form
    1,543.44/2,316.56 = 813.56/x
  3. Step 3: Cross multiply
    1,543.44x = 2,316.56 × 813.56
  4. Step 4: Simplify right side
    1,543.44x = 1,884,660.55
  5. Step 5: Solve for x
    x = 1,884,660.55/1,543.44
  6. Step 6: Final answer
    x = 1,221.08

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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.