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Finding the Fourth Proportional to 389,767.44, 537,879.10 and 220,012.50

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Solution

The fourth proportional to 389,767.44, 537,879.10 and 220,012.50 is: 303,617.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,767.44 : 537,879.10 = 220,012.50 : x
  2. Step 2: Convert to fraction form
    389,767.44/537,879.10 = 220,012.50/x
  3. Step 3: Cross multiply
    389,767.44x = 537,879.10 × 220,012.50
  4. Step 4: Simplify right side
    389,767.44x = 118,340,125,488.75
  5. Step 5: Solve for x
    x = 118,340,125,488.75/389,767.44
  6. Step 6: Final answer
    x = 303,617.27

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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.