Home / 639,378.43-882,279.37-352,880.04

Finding the Fourth Proportional to 639,378.43, 882,279.37 and 352,880.04

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Solution

The fourth proportional to 639,378.43, 882,279.37 and 352,880.04 is: 486,939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,378.43 : 882,279.37 = 352,880.04 : x
  2. Step 2: Convert to fraction form
    639,378.43/882,279.37 = 352,880.04/x
  3. Step 3: Cross multiply
    639,378.43x = 882,279.37 × 352,880.04
  4. Step 4: Simplify right side
    639,378.43x = 311,338,783,126.42
  5. Step 5: Solve for x
    x = 311,338,783,126.42/639,378.43
  6. Step 6: Final answer
    x = 486,939.77

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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.