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Finding the Fourth Proportional to 642,199.13, 886,234.86 and 355,737.77

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Solution

The fourth proportional to 642,199.13, 886,234.86 and 355,737.77 is: 490,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,199.13 : 886,234.86 = 355,737.77 : x
  2. Step 2: Convert to fraction form
    642,199.13/886,234.86 = 355,737.77/x
  3. Step 3: Cross multiply
    642,199.13x = 886,234.86 × 355,737.77
  4. Step 4: Simplify right side
    642,199.13x = 315,267,212,792.66
  5. Step 5: Solve for x
    x = 315,267,212,792.66/642,199.13
  6. Step 6: Final answer
    x = 490,918.16

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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.