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Finding the Fourth Proportional to 485,783.70, 728,675.55 and 467,121.30

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Solution

The fourth proportional to 485,783.70, 728,675.55 and 467,121.30 is: 700,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,783.70 : 728,675.55 = 467,121.30 : x
  2. Step 2: Convert to fraction form
    485,783.70/728,675.55 = 467,121.30/x
  3. Step 3: Cross multiply
    485,783.70x = 728,675.55 × 467,121.30
  4. Step 4: Simplify right side
    485,783.70x = 340,379,870,194.22
  5. Step 5: Solve for x
    x = 340,379,870,194.22/485,783.70
  6. Step 6: Final answer
    x = 700,681.95

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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.