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Finding the Fourth Proportional to 672,631, 927,705.66 and 430,936

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Solution

The fourth proportional to 672,631, 927,705.66 and 430,936 is: 594,355.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,631 : 927,705.66 = 430,936 : x
  2. Step 2: Convert to fraction form
    672,631/927,705.66 = 430,936/x
  3. Step 3: Cross multiply
    672,631x = 927,705.66 × 430,936
  4. Step 4: Simplify right side
    672,631x = 399,781,766,297.76
  5. Step 5: Solve for x
    x = 399,781,766,297.76/672,631
  6. Step 6: Final answer
    x = 594,355.25

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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.