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Finding the Fourth Proportional to 389,379.12, 584,069.88 and 108,898.80

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Solution

The fourth proportional to 389,379.12, 584,069.88 and 108,898.80 is: 163,348.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,379.12 : 584,069.88 = 108,898.80 : x
  2. Step 2: Convert to fraction form
    389,379.12/584,069.88 = 108,898.80/x
  3. Step 3: Cross multiply
    389,379.12x = 584,069.88 × 108,898.80
  4. Step 4: Simplify right side
    389,379.12x = 63,604,509,048.14
  5. Step 5: Solve for x
    x = 63,604,509,048.14/389,379.12
  6. Step 6: Final answer
    x = 163,348.54

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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.