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Finding the Fourth Proportional to 624,553, 861,999.90 and 356,281

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Solution

The fourth proportional to 624,553, 861,999.90 and 356,281 is: 491,734.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,553 : 861,999.90 = 356,281 : x
  2. Step 2: Convert to fraction form
    624,553/861,999.90 = 356,281/x
  3. Step 3: Cross multiply
    624,553x = 861,999.90 × 356,281
  4. Step 4: Simplify right side
    624,553x = 307,114,186,371.90
  5. Step 5: Solve for x
    x = 307,114,186,371.90/624,553
  6. Step 6: Final answer
    x = 491,734.39

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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.