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Finding the Fourth Proportional to 379,306.48, 568,763.70 and 139,359.10

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Solution

The fourth proportional to 379,306.48, 568,763.70 and 139,359.10 is: 208,966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,306.48 : 568,763.70 = 139,359.10 : x
  2. Step 2: Convert to fraction form
    379,306.48/568,763.70 = 139,359.10/x
  3. Step 3: Cross multiply
    379,306.48x = 568,763.70 × 139,359.10
  4. Step 4: Simplify right side
    379,306.48x = 79,262,397,344.67
  5. Step 5: Solve for x
    x = 79,262,397,344.67/379,306.48
  6. Step 6: Final answer
    x = 208,966.63

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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.