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Finding the Fourth Proportional to 621,707.60, 932,561.40 and 407,896.40

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Solution

The fourth proportional to 621,707.60, 932,561.40 and 407,896.40 is: 611,844.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,707.60 : 932,561.40 = 407,896.40 : x
  2. Step 2: Convert to fraction form
    621,707.60/932,561.40 = 407,896.40/x
  3. Step 3: Cross multiply
    621,707.60x = 932,561.40 × 407,896.40
  4. Step 4: Simplify right side
    621,707.60x = 380,388,437,838.96
  5. Step 5: Solve for x
    x = 380,388,437,838.96/621,707.60
  6. Step 6: Final answer
    x = 611,844.60

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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.