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Finding the Fourth Proportional to 520,714.60, 781,071.90 and 188,212.84

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Solution

The fourth proportional to 520,714.60, 781,071.90 and 188,212.84 is: 282,319.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,714.60 : 781,071.90 = 188,212.84 : x
  2. Step 2: Convert to fraction form
    520,714.60/781,071.90 = 188,212.84/x
  3. Step 3: Cross multiply
    520,714.60x = 781,071.90 × 188,212.84
  4. Step 4: Simplify right side
    520,714.60x = 147,007,760,543.20
  5. Step 5: Solve for x
    x = 147,007,760,543.20/520,714.60
  6. Step 6: Final answer
    x = 282,319.26

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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.