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Finding the Fourth Proportional to 641,889.09, 885,820.86 and 351,513

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Solution

The fourth proportional to 641,889.09, 885,820.86 and 351,513 is: 485,095.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,889.09 : 885,820.86 = 351,513 : x
  2. Step 2: Convert to fraction form
    641,889.09/885,820.86 = 351,513/x
  3. Step 3: Cross multiply
    641,889.09x = 885,820.86 × 351,513
  4. Step 4: Simplify right side
    641,889.09x = 311,377,547,961.18
  5. Step 5: Solve for x
    x = 311,377,547,961.18/641,889.09
  6. Step 6: Final answer
    x = 485,095.56

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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.