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Finding the Fourth Proportional to 711,807.68, 982,294.68 and 389,517.85

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Solution

The fourth proportional to 711,807.68, 982,294.68 and 389,517.85 is: 537,534.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,807.68 : 982,294.68 = 389,517.85 : x
  2. Step 2: Convert to fraction form
    711,807.68/982,294.68 = 389,517.85/x
  3. Step 3: Cross multiply
    711,807.68x = 982,294.68 × 389,517.85
  4. Step 4: Simplify right side
    711,807.68x = 382,621,311,820.04
  5. Step 5: Solve for x
    x = 382,621,311,820.04/711,807.68
  6. Step 6: Final answer
    x = 537,534.68

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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.