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Finding the Fourth Proportional to 519,012.80, 778,519.20 and 139,932.80

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Solution

The fourth proportional to 519,012.80, 778,519.20 and 139,932.80 is: 209,899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,012.80 : 778,519.20 = 139,932.80 : x
  2. Step 2: Convert to fraction form
    519,012.80/778,519.20 = 139,932.80/x
  3. Step 3: Cross multiply
    519,012.80x = 778,519.20 × 139,932.80
  4. Step 4: Simplify right side
    519,012.80x = 108,940,371,509.76
  5. Step 5: Solve for x
    x = 108,940,371,509.76/519,012.80
  6. Step 6: Final answer
    x = 209,899.20

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Similar ratio
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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.