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Finding the Fourth Proportional to 372,446.72, 513,940.93 and 209,065.83

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Solution

The fourth proportional to 372,446.72, 513,940.93 and 209,065.83 is: 288,490.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,446.72 : 513,940.93 = 209,065.83 : x
  2. Step 2: Convert to fraction form
    372,446.72/513,940.93 = 209,065.83/x
  3. Step 3: Cross multiply
    372,446.72x = 513,940.93 × 209,065.83
  4. Step 4: Simplify right side
    372,446.72x = 107,447,484,651.48
  5. Step 5: Solve for x
    x = 107,447,484,651.48/372,446.72
  6. Step 6: Final answer
    x = 288,490.89

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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.