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Finding the Fourth Proportional to 626,420.69, 864,461.11 and 339,940.77

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Solution

The fourth proportional to 626,420.69, 864,461.11 and 339,940.77 is: 469,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,420.69 : 864,461.11 = 339,940.77 : x
  2. Step 2: Convert to fraction form
    626,420.69/864,461.11 = 339,940.77/x
  3. Step 3: Cross multiply
    626,420.69x = 864,461.11 × 339,940.77
  4. Step 4: Simplify right side
    626,420.69x = 293,865,573,668.75
  5. Step 5: Solve for x
    x = 293,865,573,668.75/626,420.69
  6. Step 6: Final answer
    x = 469,118.57

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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.