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Finding the Fourth Proportional to 363,814.32, 545,721.52 and 139,243.65

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Solution

The fourth proportional to 363,814.32, 545,721.52 and 139,243.65 is: 208,865.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,814.32 : 545,721.52 = 139,243.65 : x
  2. Step 2: Convert to fraction form
    363,814.32/545,721.52 = 139,243.65/x
  3. Step 3: Cross multiply
    363,814.32x = 545,721.52 × 139,243.65
  4. Step 4: Simplify right side
    363,814.32x = 75,988,256,328.35
  5. Step 5: Solve for x
    x = 75,988,256,328.35/363,814.32
  6. Step 6: Final answer
    x = 208,865.49

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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.