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Finding the Fourth Proportional to 386,684.70, 580,054.72 and 161,818.72

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Solution

The fourth proportional to 386,684.70, 580,054.72 and 161,818.72 is: 242,739.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,684.70 : 580,054.72 = 161,818.72 : x
  2. Step 2: Convert to fraction form
    386,684.70/580,054.72 = 161,818.72/x
  3. Step 3: Cross multiply
    386,684.70x = 580,054.72 × 161,818.72
  4. Step 4: Simplify right side
    386,684.70x = 93,863,712,320.36
  5. Step 5: Solve for x
    x = 93,863,712,320.36/386,684.70
  6. Step 6: Final answer
    x = 242,739.66

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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.