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Finding the Fourth Proportional to 379,782.99, 569,499.15 and 139,836.63

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Solution

The fourth proportional to 379,782.99, 569,499.15 and 139,836.63 is: 209,690.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,782.99 : 569,499.15 = 139,836.63 : x
  2. Step 2: Convert to fraction form
    379,782.99/569,499.15 = 139,836.63/x
  3. Step 3: Cross multiply
    379,782.99x = 569,499.15 × 139,836.63
  4. Step 4: Simplify right side
    379,782.99x = 79,636,841,923.86
  5. Step 5: Solve for x
    x = 79,636,841,923.86/379,782.99
  6. Step 6: Final answer
    x = 209,690.39

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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.