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Finding the Fourth Proportional to 520,066.20, 780,099.30 and 268,123.80

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Solution

The fourth proportional to 520,066.20, 780,099.30 and 268,123.80 is: 402,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,066.20 : 780,099.30 = 268,123.80 : x
  2. Step 2: Convert to fraction form
    520,066.20/780,099.30 = 268,123.80/x
  3. Step 3: Cross multiply
    520,066.20x = 780,099.30 × 268,123.80
  4. Step 4: Simplify right side
    520,066.20x = 209,163,188,693.34
  5. Step 5: Solve for x
    x = 209,163,188,693.34/520,066.20
  6. Step 6: Final answer
    x = 402,185.70

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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.