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Finding the Fourth Proportional to 639,845, 882,986.10 and 371,590.28

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Solution

The fourth proportional to 639,845, 882,986.10 and 371,590.28 is: 512,794.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,845 : 882,986.10 = 371,590.28 : x
  2. Step 2: Convert to fraction form
    639,845/882,986.10 = 371,590.28/x
  3. Step 3: Cross multiply
    639,845x = 882,986.10 × 371,590.28
  4. Step 4: Simplify right side
    639,845x = 328,109,052,135.11
  5. Step 5: Solve for x
    x = 328,109,052,135.11/639,845
  6. Step 6: Final answer
    x = 512,794.59

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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.