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Finding the Fourth Proportional to 531,876.60, 797,814.90 and 405,905.40

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Solution

The fourth proportional to 531,876.60, 797,814.90 and 405,905.40 is: 608,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,876.60 : 797,814.90 = 405,905.40 : x
  2. Step 2: Convert to fraction form
    531,876.60/797,814.90 = 405,905.40/x
  3. Step 3: Cross multiply
    531,876.60x = 797,814.90 × 405,905.40
  4. Step 4: Simplify right side
    531,876.60x = 323,837,376,110.46
  5. Step 5: Solve for x
    x = 323,837,376,110.46/531,876.60
  6. Step 6: Final answer
    x = 608,858.10

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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.