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Finding the Fourth Proportional to 258,416.46, 387,229.95 and 108,574.83

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Solution

The fourth proportional to 258,416.46, 387,229.95 and 108,574.83 is: 162,696.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,416.46 : 387,229.95 = 108,574.83 : x
  2. Step 2: Convert to fraction form
    258,416.46/387,229.95 = 108,574.83/x
  3. Step 3: Cross multiply
    258,416.46x = 387,229.95 × 108,574.83
  4. Step 4: Simplify right side
    258,416.46x = 42,043,425,992.16
  5. Step 5: Solve for x
    x = 42,043,425,992.16/258,416.46
  6. Step 6: Final answer
    x = 162,696.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.