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Finding the Fourth Proportional to 642,129.93, 886,106.79 and 351,737.64

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Solution

The fourth proportional to 642,129.93, 886,106.79 and 351,737.64 is: 485,380.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,129.93 : 886,106.79 = 351,737.64 : x
  2. Step 2: Convert to fraction form
    642,129.93/886,106.79 = 351,737.64/x
  3. Step 3: Cross multiply
    642,129.93x = 886,106.79 × 351,737.64
  4. Step 4: Simplify right side
    642,129.93x = 311,677,111,102.58
  5. Step 5: Solve for x
    x = 311,677,111,102.58/642,129.93
  6. Step 6: Final answer
    x = 485,380.13

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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.