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Finding the Fourth Proportional to 389,866.40, 585,145.20 and 333,879.20

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Solution

The fourth proportional to 389,866.40, 585,145.20 and 333,879.20 is: 501,114.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,866.40 : 585,145.20 = 333,879.20 : x
  2. Step 2: Convert to fraction form
    389,866.40/585,145.20 = 333,879.20/x
  3. Step 3: Cross multiply
    389,866.40x = 585,145.20 × 333,879.20
  4. Step 4: Simplify right side
    389,866.40x = 195,367,811,259.84
  5. Step 5: Solve for x
    x = 195,367,811,259.84/389,866.40
  6. Step 6: Final answer
    x = 501,114.77

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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.