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Finding the Fourth Proportional to 543,628.40, 815,438.55 and 164,548.40

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Solution

The fourth proportional to 543,628.40, 815,438.55 and 164,548.40 is: 246,821.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,628.40 : 815,438.55 = 164,548.40 : x
  2. Step 2: Convert to fraction form
    543,628.40/815,438.55 = 164,548.40/x
  3. Step 3: Cross multiply
    543,628.40x = 815,438.55 × 164,548.40
  4. Step 4: Simplify right side
    543,628.40x = 134,179,108,700.82
  5. Step 5: Solve for x
    x = 134,179,108,700.82/543,628.40
  6. Step 6: Final answer
    x = 246,821.37

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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.