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Finding the Fourth Proportional to 524,807.40, 787,211.10 and 259,086.90

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Solution

The fourth proportional to 524,807.40, 787,211.10 and 259,086.90 is: 388,630.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,807.40 : 787,211.10 = 259,086.90 : x
  2. Step 2: Convert to fraction form
    524,807.40/787,211.10 = 259,086.90/x
  3. Step 3: Cross multiply
    524,807.40x = 787,211.10 × 259,086.90
  4. Step 4: Simplify right side
    524,807.40x = 203,956,083,544.59
  5. Step 5: Solve for x
    x = 203,956,083,544.59/524,807.40
  6. Step 6: Final answer
    x = 388,630.35

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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.