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Finding the Fourth Proportional to 839,807.10, 1,259,710.65 and 603,611.10

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Solution

The fourth proportional to 839,807.10, 1,259,710.65 and 603,611.10 is: 905,416.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,807.10 : 1,259,710.65 = 603,611.10 : x
  2. Step 2: Convert to fraction form
    839,807.10/1,259,710.65 = 603,611.10/x
  3. Step 3: Cross multiply
    839,807.10x = 1,259,710.65 × 603,611.10
  4. Step 4: Simplify right side
    839,807.10x = 760,375,331,128.22
  5. Step 5: Solve for x
    x = 760,375,331,128.22/839,807.10
  6. Step 6: Final answer
    x = 905,416.65

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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.