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Finding the Fourth Proportional to 522,069.70, 783,104.55 and 312,117.70

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Solution

The fourth proportional to 522,069.70, 783,104.55 and 312,117.70 is: 468,176.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,069.70 : 783,104.55 = 312,117.70 : x
  2. Step 2: Convert to fraction form
    522,069.70/783,104.55 = 312,117.70/x
  3. Step 3: Cross multiply
    522,069.70x = 783,104.55 × 312,117.70
  4. Step 4: Simplify right side
    522,069.70x = 244,420,791,005.54
  5. Step 5: Solve for x
    x = 244,420,791,005.54/522,069.70
  6. Step 6: Final answer
    x = 468,176.55

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Half scale
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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.