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Finding the Fourth Proportional to 379,305.48, 568,762.20 and 139,358.10

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Solution

The fourth proportional to 379,305.48, 568,762.20 and 139,358.10 is: 208,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,305.48 : 568,762.20 = 139,358.10 : x
  2. Step 2: Convert to fraction form
    379,305.48/568,762.20 = 139,358.10/x
  3. Step 3: Cross multiply
    379,305.48x = 568,762.20 × 139,358.10
  4. Step 4: Simplify right side
    379,305.48x = 79,261,619,543.82
  5. Step 5: Solve for x
    x = 79,261,619,543.82/379,305.48
  6. Step 6: Final answer
    x = 208,965.13

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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.