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Finding the Fourth Proportional to 639,630.75, 882,768.20 and 371,358.75

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Solution

The fourth proportional to 639,630.75, 882,768.20 and 371,358.75 is: 512,520.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,630.75 : 882,768.20 = 371,358.75 : x
  2. Step 2: Convert to fraction form
    639,630.75/882,768.20 = 371,358.75/x
  3. Step 3: Cross multiply
    639,630.75x = 882,768.20 × 371,358.75
  4. Step 4: Simplify right side
    639,630.75x = 327,823,693,434.96
  5. Step 5: Solve for x
    x = 327,823,693,434.96/639,630.75
  6. Step 6: Final answer
    x = 512,520.22

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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.