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Finding the Fourth Proportional to 623,640.70, 935,898.45 and 399,546.10

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Solution

The fourth proportional to 623,640.70, 935,898.45 and 399,546.10 is: 599,599.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,640.70 : 935,898.45 = 399,546.10 : x
  2. Step 2: Convert to fraction form
    623,640.70/935,898.45 = 399,546.10/x
  3. Step 3: Cross multiply
    623,640.70x = 935,898.45 × 399,546.10
  4. Step 4: Simplify right side
    623,640.70x = 373,934,575,693.55
  5. Step 5: Solve for x
    x = 373,934,575,693.55/623,640.70
  6. Step 6: Final answer
    x = 599,599.38

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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.