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Finding the Fourth Proportional to 485,801.40, 728,183.70 and 186,166.20

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Solution

The fourth proportional to 485,801.40, 728,183.70 and 186,166.20 is: 279,050.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,801.40 : 728,183.70 = 186,166.20 : x
  2. Step 2: Convert to fraction form
    485,801.40/728,183.70 = 186,166.20/x
  3. Step 3: Cross multiply
    485,801.40x = 728,183.70 × 186,166.20
  4. Step 4: Simplify right side
    485,801.40x = 135,563,192,330.94
  5. Step 5: Solve for x
    x = 135,563,192,330.94/485,801.40
  6. Step 6: Final answer
    x = 279,050.64

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1.5x scale

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.