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Finding the Fourth Proportional to 353,306.60, 528,750.30 and 213,165.80

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Solution

The fourth proportional to 353,306.60, 528,750.30 and 213,165.80 is: 319,018.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,306.60 : 528,750.30 = 213,165.80 : x
  2. Step 2: Convert to fraction form
    353,306.60/528,750.30 = 213,165.80/x
  3. Step 3: Cross multiply
    353,306.60x = 528,750.30 × 213,165.80
  4. Step 4: Simplify right side
    353,306.60x = 112,711,480,699.74
  5. Step 5: Solve for x
    x = 112,711,480,699.74/353,306.60
  6. Step 6: Final answer
    x = 319,018.89

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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.