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Finding the Fourth Proportional to 641,840.12, 885,752.88 and 351,463.90

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Solution

The fourth proportional to 641,840.12, 885,752.88 and 351,463.90 is: 485,027.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,840.12 : 885,752.88 = 351,463.90 : x
  2. Step 2: Convert to fraction form
    641,840.12/885,752.88 = 351,463.90/x
  3. Step 3: Cross multiply
    641,840.12x = 885,752.88 × 351,463.90
  4. Step 4: Simplify right side
    641,840.12x = 311,310,161,641.03
  5. Step 5: Solve for x
    x = 311,310,161,641.03/641,840.12
  6. Step 6: Final answer
    x = 485,027.58

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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.