Home / 639,905.87-882,994.57-353,408.87

Finding the Fourth Proportional to 639,905.87, 882,994.57 and 353,408.87

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Solution

The fourth proportional to 639,905.87, 882,994.57 and 353,408.87 is: 487,662.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,905.87 : 882,994.57 = 353,408.87 : x
  2. Step 2: Convert to fraction form
    639,905.87/882,994.57 = 353,408.87/x
  3. Step 3: Cross multiply
    639,905.87x = 882,994.57 × 353,408.87
  4. Step 4: Simplify right side
    639,905.87x = 312,058,114,523.80
  5. Step 5: Solve for x
    x = 312,058,114,523.80/639,905.87
  6. Step 6: Final answer
    x = 487,662.53

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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.