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Finding the Fourth Proportional to 543,376.42, 815,438.34 and 188,390.44

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Solution

The fourth proportional to 543,376.42, 815,438.34 and 188,390.44 is: 282,715.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,376.42 : 815,438.34 = 188,390.44 : x
  2. Step 2: Convert to fraction form
    543,376.42/815,438.34 = 188,390.44/x
  3. Step 3: Cross multiply
    543,376.42x = 815,438.34 × 188,390.44
  4. Step 4: Simplify right side
    543,376.42x = 153,620,788,684.77
  5. Step 5: Solve for x
    x = 153,620,788,684.77/543,376.42
  6. Step 6: Final answer
    x = 282,715.23

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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.