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Finding the Fourth Proportional to 641,639.86, 885,557.94 and 369,656.04

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Solution

The fourth proportional to 641,639.86, 885,557.94 and 369,656.04 is: 510,180.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,639.86 : 885,557.94 = 369,656.04 : x
  2. Step 2: Convert to fraction form
    641,639.86/885,557.94 = 369,656.04/x
  3. Step 3: Cross multiply
    641,639.86x = 885,557.94 × 369,656.04
  4. Step 4: Simplify right side
    641,639.86x = 327,351,841,290.96
  5. Step 5: Solve for x
    x = 327,351,841,290.96/641,639.86
  6. Step 6: Final answer
    x = 510,180.03

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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.