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Finding the Fourth Proportional to 711,796.76, 982,279.50 and 389,506.92

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Solution

The fourth proportional to 711,796.76, 982,279.50 and 389,506.92 is: 537,519.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,796.76 : 982,279.50 = 389,506.92 : x
  2. Step 2: Convert to fraction form
    711,796.76/982,279.50 = 389,506.92/x
  3. Step 3: Cross multiply
    711,796.76x = 982,279.50 × 389,506.92
  4. Step 4: Simplify right side
    711,796.76x = 382,604,662,624.14
  5. Step 5: Solve for x
    x = 382,604,662,624.14/711,796.76
  6. Step 6: Final answer
    x = 537,519.53

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.