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Finding the Fourth Proportional to 353,308.60, 528,753.30 and 213,167.80

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Solution

The fourth proportional to 353,308.60, 528,753.30 and 213,167.80 is: 319,021.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,308.60 : 528,753.30 = 213,167.80 : x
  2. Step 2: Convert to fraction form
    353,308.60/528,753.30 = 213,167.80/x
  3. Step 3: Cross multiply
    353,308.60x = 528,753.30 × 213,167.80
  4. Step 4: Simplify right side
    353,308.60x = 112,713,177,703.74
  5. Step 5: Solve for x
    x = 112,713,177,703.74/353,308.60
  6. Step 6: Final answer
    x = 319,021.89

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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.