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Finding the Fourth Proportional to 485,692.48, 728,626.40 and 219,578.32

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Solution

The fourth proportional to 485,692.48, 728,626.40 and 219,578.32 is: 329,407.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,692.48 : 728,626.40 = 219,578.32 : x
  2. Step 2: Convert to fraction form
    485,692.48/728,626.40 = 219,578.32/x
  3. Step 3: Cross multiply
    485,692.48x = 728,626.40 × 219,578.32
  4. Step 4: Simplify right side
    485,692.48x = 159,990,560,819.65
  5. Step 5: Solve for x
    x = 159,990,560,819.65/485,692.48
  6. Step 6: Final answer
    x = 329,407.12

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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.