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Finding the Fourth Proportional to 641,879.36, 885,807.36 and 351,503.16

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Solution

The fourth proportional to 641,879.36, 885,807.36 and 351,503.16 is: 485,081.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,879.36 : 885,807.36 = 351,503.16 : x
  2. Step 2: Convert to fraction form
    641,879.36/885,807.36 = 351,503.16/x
  3. Step 3: Cross multiply
    641,879.36x = 885,807.36 × 351,503.16
  4. Step 4: Simplify right side
    641,879.36x = 311,364,086,191.26
  5. Step 5: Solve for x
    x = 311,364,086,191.26/641,879.36
  6. Step 6: Final answer
    x = 485,081.94

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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.