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Finding the Fourth Proportional to 547,285.40, 820,928.10 and 509,960.60

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Solution

The fourth proportional to 547,285.40, 820,928.10 and 509,960.60 is: 764,940.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,285.40 : 820,928.10 = 509,960.60 : x
  2. Step 2: Convert to fraction form
    547,285.40/820,928.10 = 509,960.60/x
  3. Step 3: Cross multiply
    547,285.40x = 820,928.10 × 509,960.60
  4. Step 4: Simplify right side
    547,285.40x = 418,640,986,432.86
  5. Step 5: Solve for x
    x = 418,640,986,432.86/547,285.40
  6. Step 6: Final answer
    x = 764,940.90

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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.