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Finding the Fourth Proportional to 545,428.80, 818,189.28 and 171,558.72

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Solution

The fourth proportional to 545,428.80, 818,189.28 and 171,558.72 is: 257,352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,428.80 : 818,189.28 = 171,558.72 : x
  2. Step 2: Convert to fraction form
    545,428.80/818,189.28 = 171,558.72/x
  3. Step 3: Cross multiply
    545,428.80x = 818,189.28 × 171,558.72
  4. Step 4: Simplify right side
    545,428.80x = 140,367,505,594.52
  5. Step 5: Solve for x
    x = 140,367,505,594.52/545,428.80
  6. Step 6: Final answer
    x = 257,352.57

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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.