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Finding the Fourth Proportional to 485,735.80, 728,603.70 and 309,026.20

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Solution

The fourth proportional to 485,735.80, 728,603.70 and 309,026.20 is: 463,539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,735.80 : 728,603.70 = 309,026.20 : x
  2. Step 2: Convert to fraction form
    485,735.80/728,603.70 = 309,026.20/x
  3. Step 3: Cross multiply
    485,735.80x = 728,603.70 × 309,026.20
  4. Step 4: Simplify right side
    485,735.80x = 225,157,632,716.94
  5. Step 5: Solve for x
    x = 225,157,632,716.94/485,735.80
  6. Step 6: Final answer
    x = 463,539.30

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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.