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Finding the Fourth Proportional to 320,003.40, 479,567.70 and 213,083.40

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Solution

The fourth proportional to 320,003.40, 479,567.70 and 213,083.40 is: 319,333.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,003.40 : 479,567.70 = 213,083.40 : x
  2. Step 2: Convert to fraction form
    320,003.40/479,567.70 = 213,083.40/x
  3. Step 3: Cross multiply
    320,003.40x = 479,567.70 × 213,083.40
  4. Step 4: Simplify right side
    320,003.40x = 102,187,916,046.18
  5. Step 5: Solve for x
    x = 102,187,916,046.18/320,003.40
  6. Step 6: Final answer
    x = 319,333.84

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1.5x scale

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.