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Finding the Fourth Proportional to 515,561.65, 773,157.94 and 178,511.84

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Solution

The fourth proportional to 515,561.65, 773,157.94 and 178,511.84 is: 267,703.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,561.65 : 773,157.94 = 178,511.84 : x
  2. Step 2: Convert to fraction form
    515,561.65/773,157.94 = 178,511.84/x
  3. Step 3: Cross multiply
    515,561.65x = 773,157.94 × 178,511.84
  4. Step 4: Simplify right side
    515,561.65x = 138,017,846,480.01
  5. Step 5: Solve for x
    x = 138,017,846,480.01/515,561.65
  6. Step 6: Final answer
    x = 267,703.87

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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.