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Finding the Fourth Proportional to 387,614.42, 581,509.38 and 134,906.84

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Solution

The fourth proportional to 387,614.42, 581,509.38 and 134,906.84 is: 202,390.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,614.42 : 581,509.38 = 134,906.84 : x
  2. Step 2: Convert to fraction form
    387,614.42/581,509.38 = 134,906.84/x
  3. Step 3: Cross multiply
    387,614.42x = 581,509.38 × 134,906.84
  4. Step 4: Simplify right side
    387,614.42x = 78,449,592,211.63
  5. Step 5: Solve for x
    x = 78,449,592,211.63/387,614.42
  6. Step 6: Final answer
    x = 202,390.80

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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.