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Finding the Fourth Proportional to 620,626.20, 930,939.30 and 266,332.20

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Solution

The fourth proportional to 620,626.20, 930,939.30 and 266,332.20 is: 399,498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,626.20 : 930,939.30 = 266,332.20 : x
  2. Step 2: Convert to fraction form
    620,626.20/930,939.30 = 266,332.20/x
  3. Step 3: Cross multiply
    620,626.20x = 930,939.30 × 266,332.20
  4. Step 4: Simplify right side
    620,626.20x = 247,939,111,835.46
  5. Step 5: Solve for x
    x = 247,939,111,835.46/620,626.20
  6. Step 6: Final answer
    x = 399,498.30

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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.