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Finding the Fourth Proportional to 522,072.80, 783,109.20 and 312,120.80

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Solution

The fourth proportional to 522,072.80, 783,109.20 and 312,120.80 is: 468,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,072.80 : 783,109.20 = 312,120.80 : x
  2. Step 2: Convert to fraction form
    522,072.80/783,109.20 = 312,120.80/x
  3. Step 3: Cross multiply
    522,072.80x = 783,109.20 × 312,120.80
  4. Step 4: Simplify right side
    522,072.80x = 244,424,669,991.36
  5. Step 5: Solve for x
    x = 244,424,669,991.36/522,072.80
  6. Step 6: Final answer
    x = 468,181.20

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Double scale
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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.