Home / 639,824.27-882,979.28-378,403.67

Finding the Fourth Proportional to 639,824.27, 882,979.28 and 378,403.67

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Solution

The fourth proportional to 639,824.27, 882,979.28 and 378,403.67 is: 522,209.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,824.27 : 882,979.28 = 378,403.67 : x
  2. Step 2: Convert to fraction form
    639,824.27/882,979.28 = 378,403.67/x
  3. Step 3: Cross multiply
    639,824.27x = 882,979.28 × 378,403.67
  4. Step 4: Simplify right side
    639,824.27x = 334,122,600,085.96
  5. Step 5: Solve for x
    x = 334,122,600,085.96/639,824.27
  6. Step 6: Final answer
    x = 522,209.95

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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.