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Finding the Fourth Proportional to 514,538.10, 771,807.15 and 140,561.10

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Solution

The fourth proportional to 514,538.10, 771,807.15 and 140,561.10 is: 210,841.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,538.10 : 771,807.15 = 140,561.10 : x
  2. Step 2: Convert to fraction form
    514,538.10/771,807.15 = 140,561.10/x
  3. Step 3: Cross multiply
    514,538.10x = 771,807.15 × 140,561.10
  4. Step 4: Simplify right side
    514,538.10x = 108,486,061,991.87
  5. Step 5: Solve for x
    x = 108,486,061,991.87/514,538.10
  6. Step 6: Final answer
    x = 210,841.65

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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.