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Finding the Fourth Proportional to 522,077.40, 783,116.10 and 389,217.15

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Solution

The fourth proportional to 522,077.40, 783,116.10 and 389,217.15 is: 583,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,077.40 : 783,116.10 = 389,217.15 : x
  2. Step 2: Convert to fraction form
    522,077.40/783,116.10 = 389,217.15/x
  3. Step 3: Cross multiply
    522,077.40x = 783,116.10 × 389,217.15
  4. Step 4: Simplify right side
    522,077.40x = 304,802,216,561.12
  5. Step 5: Solve for x
    x = 304,802,216,561.12/522,077.40
  6. Step 6: Final answer
    x = 583,825.73

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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.