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Finding the Fourth Proportional to 641,842.12, 885,755.64 and 351,465.92

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Solution

The fourth proportional to 641,842.12, 885,755.64 and 351,465.92 is: 485,030.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,842.12 : 885,755.64 = 351,465.92 : x
  2. Step 2: Convert to fraction form
    641,842.12/885,755.64 = 351,465.92/x
  3. Step 3: Cross multiply
    641,842.12x = 885,755.64 × 351,465.92
  4. Step 4: Simplify right side
    641,842.12x = 311,312,920,907.79
  5. Step 5: Solve for x
    x = 311,312,920,907.79/641,842.12
  6. Step 6: Final answer
    x = 485,030.37

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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.