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Finding the Fourth Proportional to 387,817.62, 535,008.66 and 226,679.46

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Solution

The fourth proportional to 387,817.62, 535,008.66 and 226,679.46 is: 312,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,817.62 : 535,008.66 = 226,679.46 : x
  2. Step 2: Convert to fraction form
    387,817.62/535,008.66 = 226,679.46/x
  3. Step 3: Cross multiply
    387,817.62x = 535,008.66 × 226,679.46
  4. Step 4: Simplify right side
    387,817.62x = 121,275,474,144.12
  5. Step 5: Solve for x
    x = 121,275,474,144.12/387,817.62
  6. Step 6: Final answer
    x = 312,712.65

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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.