Home / 638,563.20-881,213.92-348,190.36

Finding the Fourth Proportional to 638,563.20, 881,213.92 and 348,190.36

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Solution

The fourth proportional to 638,563.20, 881,213.92 and 348,190.36 is: 480,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,563.20 : 881,213.92 = 348,190.36 : x
  2. Step 2: Convert to fraction form
    638,563.20/881,213.92 = 348,190.36/x
  3. Step 3: Cross multiply
    638,563.20x = 881,213.92 × 348,190.36
  4. Step 4: Simplify right side
    638,563.20x = 306,830,192,041.81
  5. Step 5: Solve for x
    x = 306,830,192,041.81/638,563.20
  6. Step 6: Final answer
    x = 480,500.90

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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.