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Finding the Fourth Proportional to 621,115.24, 857,405.10 and 427,794.16

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Solution

The fourth proportional to 621,115.24, 857,405.10 and 427,794.16 is: 590,539.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,115.24 : 857,405.10 = 427,794.16 : x
  2. Step 2: Convert to fraction form
    621,115.24/857,405.10 = 427,794.16/x
  3. Step 3: Cross multiply
    621,115.24x = 857,405.10 × 427,794.16
  4. Step 4: Simplify right side
    621,115.24x = 366,792,894,534.22
  5. Step 5: Solve for x
    x = 366,792,894,534.22/621,115.24
  6. Step 6: Final answer
    x = 590,539.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.