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Finding the Fourth Proportional to 522,078.80, 783,118.20 and 312,126.80

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Solution

The fourth proportional to 522,078.80, 783,118.20 and 312,126.80 is: 468,190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,078.80 : 783,118.20 = 312,126.80 : x
  2. Step 2: Convert to fraction form
    522,078.80/783,118.20 = 312,126.80/x
  3. Step 3: Cross multiply
    522,078.80x = 783,118.20 × 312,126.80
  4. Step 4: Simplify right side
    522,078.80x = 244,432,177,787.76
  5. Step 5: Solve for x
    x = 244,432,177,787.76/522,078.80
  6. Step 6: Final answer
    x = 468,190.20

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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.