Home / 639,105.40-882,285.05-397,465.81

Finding the Fourth Proportional to 639,105.40, 882,285.05 and 397,465.81

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Solution

The fourth proportional to 639,105.40, 882,285.05 and 397,465.81 is: 548,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,105.40 : 882,285.05 = 397,465.81 : x
  2. Step 2: Convert to fraction form
    639,105.40/882,285.05 = 397,465.81/x
  3. Step 3: Cross multiply
    639,105.40x = 882,285.05 × 397,465.81
  4. Step 4: Simplify right side
    639,105.40x = 350,678,142,049.14
  5. Step 5: Solve for x
    x = 350,678,142,049.14/639,105.40
  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.