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Finding the Fourth Proportional to 582,665.40, 873,998.10 and 405,718.20

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Solution

The fourth proportional to 582,665.40, 873,998.10 and 405,718.20 is: 608,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    582,665.40 : 873,998.10 = 405,718.20 : x
  2. Step 2: Convert to fraction form
    582,665.40/873,998.10 = 405,718.20/x
  3. Step 3: Cross multiply
    582,665.40x = 873,998.10 × 405,718.20
  4. Step 4: Simplify right side
    582,665.40x = 354,596,935,935.42
  5. Step 5: Solve for x
    x = 354,596,935,935.42/582,665.40
  6. Step 6: Final answer
    x = 608,577.30

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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.