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Finding the Fourth Proportional to 485,783.20, 728,674.80 and 467,120.80

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Solution

The fourth proportional to 485,783.20, 728,674.80 and 467,120.80 is: 700,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,783.20 : 728,674.80 = 467,120.80 : x
  2. Step 2: Convert to fraction form
    485,783.20/728,674.80 = 467,120.80/x
  3. Step 3: Cross multiply
    485,783.20x = 728,674.80 × 467,120.80
  4. Step 4: Simplify right side
    485,783.20x = 340,379,155,515.84
  5. Step 5: Solve for x
    x = 340,379,155,515.84/485,783.20
  6. Step 6: Final answer
    x = 700,681.20

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Similar ratio
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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.