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Finding the Fourth Proportional to 485,722.20, 728,583.30 and 397,075.80

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Solution

The fourth proportional to 485,722.20, 728,583.30 and 397,075.80 is: 595,613.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,722.20 : 728,583.30 = 397,075.80 : x
  2. Step 2: Convert to fraction form
    485,722.20/728,583.30 = 397,075.80/x
  3. Step 3: Cross multiply
    485,722.20x = 728,583.30 × 397,075.80
  4. Step 4: Simplify right side
    485,722.20x = 289,302,796,714.14
  5. Step 5: Solve for x
    x = 289,302,796,714.14/485,722.20
  6. Step 6: Final answer
    x = 595,613.70

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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.