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Finding the Fourth Proportional to 641,376.84, 885,063.16 and 354,882.54

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Solution

The fourth proportional to 641,376.84, 885,063.16 and 354,882.54 is: 489,717.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,376.84 : 885,063.16 = 354,882.54 : x
  2. Step 2: Convert to fraction form
    641,376.84/885,063.16 = 354,882.54/x
  3. Step 3: Cross multiply
    641,376.84x = 885,063.16 × 354,882.54
  4. Step 4: Simplify right side
    641,376.84x = 314,093,462,281.23
  5. Step 5: Solve for x
    x = 314,093,462,281.23/641,376.84
  6. Step 6: Final answer
    x = 489,717.50

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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.