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Finding the Fourth Proportional to 626,576.30, 939,864.45 and 413,999.90

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Solution

The fourth proportional to 626,576.30, 939,864.45 and 413,999.90 is: 620,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,576.30 : 939,864.45 = 413,999.90 : x
  2. Step 2: Convert to fraction form
    626,576.30/939,864.45 = 413,999.90/x
  3. Step 3: Cross multiply
    626,576.30x = 939,864.45 × 413,999.90
  4. Step 4: Simplify right side
    626,576.30x = 389,103,788,313.56
  5. Step 5: Solve for x
    x = 389,103,788,313.56/626,576.30
  6. Step 6: Final answer
    x = 620,999.85

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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.