Home / 639,105.39-882,285.04-397,465.81

Finding the Fourth Proportional to 639,105.39, 882,285.04 and 397,465.81

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Solution

The fourth proportional to 639,105.39, 882,285.04 and 397,465.81 is: 548,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,105.39 : 882,285.04 = 397,465.81 : x
  2. Step 2: Convert to fraction form
    639,105.39/882,285.04 = 397,465.81/x
  3. Step 3: Cross multiply
    639,105.39x = 882,285.04 × 397,465.81
  4. Step 4: Simplify right side
    639,105.39x = 350,678,138,074.48
  5. Step 5: Solve for x
    x = 350,678,138,074.48/639,105.39
  6. Step 6: Final answer
    x = 548,701.58

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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.