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Finding the Fourth Proportional to 408,666.66, 613,379.61 and 209,130.18

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Solution

The fourth proportional to 408,666.66, 613,379.61 and 209,130.18 is: 313,889.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,666.66 : 613,379.61 = 209,130.18 : x
  2. Step 2: Convert to fraction form
    408,666.66/613,379.61 = 209,130.18/x
  3. Step 3: Cross multiply
    408,666.66x = 613,379.61 × 209,130.18
  4. Step 4: Simplify right side
    408,666.66x = 128,276,188,247.63
  5. Step 5: Solve for x
    x = 128,276,188,247.63/408,666.66
  6. Step 6: Final answer
    x = 313,889.54

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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.