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Finding the Fourth Proportional to 641,155.50, 884,718.05 and 354,636.63

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Solution

The fourth proportional to 641,155.50, 884,718.05 and 354,636.63 is: 489,356.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,155.50 : 884,718.05 = 354,636.63 : x
  2. Step 2: Convert to fraction form
    641,155.50/884,718.05 = 354,636.63/x
  3. Step 3: Cross multiply
    641,155.50x = 884,718.05 × 354,636.63
  4. Step 4: Simplify right side
    641,155.50x = 313,753,425,978.99
  5. Step 5: Solve for x
    x = 313,753,425,978.99/641,155.50
  6. Step 6: Final answer
    x = 489,356.21

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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.