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Finding the Fourth Proportional to 2,543.95, 3,811.37 and 899.45

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Solution

The fourth proportional to 2,543.95, 3,811.37 and 899.45 is: 1,347.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.95 : 3,811.37 = 899.45 : x
  2. Step 2: Convert to fraction form
    2,543.95/3,811.37 = 899.45/x
  3. Step 3: Cross multiply
    2,543.95x = 3,811.37 × 899.45
  4. Step 4: Simplify right side
    2,543.95x = 3,428,113.19
  5. Step 5: Solve for x
    x = 3,428,113.19/2,543.95
  6. Step 6: Final answer
    x = 1,347.56

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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.