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Finding the Fourth Proportional to 395,118.65, 545,263.69 and 213,830.62

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Solution

The fourth proportional to 395,118.65, 545,263.69 and 213,830.62 is: 295,086.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,118.65 : 545,263.69 = 213,830.62 : x
  2. Step 2: Convert to fraction form
    395,118.65/545,263.69 = 213,830.62/x
  3. Step 3: Cross multiply
    395,118.65x = 545,263.69 × 213,830.62
  4. Step 4: Simplify right side
    395,118.65x = 116,594,074,752.16
  5. Step 5: Solve for x
    x = 116,594,074,752.16/395,118.65
  6. Step 6: Final answer
    x = 295,086.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.