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Finding the Fourth Proportional to 538,279.40, 806,447.10 and 313,455.80

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Solution

The fourth proportional to 538,279.40, 806,447.10 and 313,455.80 is: 469,617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,279.40 : 806,447.10 = 313,455.80 : x
  2. Step 2: Convert to fraction form
    538,279.40/806,447.10 = 313,455.80/x
  3. Step 3: Cross multiply
    538,279.40x = 806,447.10 × 313,455.80
  4. Step 4: Simplify right side
    538,279.40x = 252,785,520,888.18
  5. Step 5: Solve for x
    x = 252,785,520,888.18/538,279.40
  6. Step 6: Final answer
    x = 469,617.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.