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Finding the Fourth Proportional to 711,809.96, 982,297.64 and 389,520.10

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Solution

The fourth proportional to 711,809.96, 982,297.64 and 389,520.10 is: 537,537.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,809.96 : 982,297.64 = 389,520.10 : x
  2. Step 2: Convert to fraction form
    711,809.96/982,297.64 = 389,520.10/x
  3. Step 3: Cross multiply
    711,809.96x = 982,297.64 × 389,520.10
  4. Step 4: Simplify right side
    711,809.96x = 382,624,674,962.56
  5. Step 5: Solve for x
    x = 382,624,674,962.56/711,809.96
  6. Step 6: Final answer
    x = 537,537.68

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Double scale
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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.