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Finding the Fourth Proportional to 543,376.80, 815,438.90 and 188,390.82

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Solution

The fourth proportional to 543,376.80, 815,438.90 and 188,390.82 is: 282,715.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,376.80 : 815,438.90 = 188,390.82 : x
  2. Step 2: Convert to fraction form
    543,376.80/815,438.90 = 188,390.82/x
  3. Step 3: Cross multiply
    543,376.80x = 815,438.90 × 188,390.82
  4. Step 4: Simplify right side
    543,376.80x = 153,621,200,443.98
  5. Step 5: Solve for x
    x = 153,621,200,443.98/543,376.80
  6. Step 6: Final answer
    x = 282,715.79

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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.