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Finding the Fourth Proportional to 617,434.86, 851,243.31 and 445,208.70

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Solution

The fourth proportional to 617,434.86, 851,243.31 and 445,208.70 is: 613,799.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,434.86 : 851,243.31 = 445,208.70 : x
  2. Step 2: Convert to fraction form
    617,434.86/851,243.31 = 445,208.70/x
  3. Step 3: Cross multiply
    617,434.86x = 851,243.31 × 445,208.70
  4. Step 4: Simplify right side
    617,434.86x = 378,980,927,428.80
  5. Step 5: Solve for x
    x = 378,980,927,428.80/617,434.86
  6. Step 6: Final answer
    x = 613,799.05

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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.