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Finding the Fourth Proportional to 626,603.20, 864,709.50 and 340,120.78

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Solution

The fourth proportional to 626,603.20, 864,709.50 and 340,120.78 is: 469,365.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,603.20 : 864,709.50 = 340,120.78 : x
  2. Step 2: Convert to fraction form
    626,603.20/864,709.50 = 340,120.78/x
  3. Step 3: Cross multiply
    626,603.20x = 864,709.50 × 340,120.78
  4. Step 4: Simplify right side
    626,603.20x = 294,105,669,613.41
  5. Step 5: Solve for x
    x = 294,105,669,613.41/626,603.20
  6. Step 6: Final answer
    x = 469,365.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.