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Finding the Fourth Proportional to 288,991.70, 398,820.75 and 178,634.87

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Solution

The fourth proportional to 288,991.70, 398,820.75 and 178,634.87 is: 246,523.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,991.70 : 398,820.75 = 178,634.87 : x
  2. Step 2: Convert to fraction form
    288,991.70/398,820.75 = 178,634.87/x
  3. Step 3: Cross multiply
    288,991.70x = 398,820.75 × 178,634.87
  4. Step 4: Simplify right side
    288,991.70x = 71,243,292,829.55
  5. Step 5: Solve for x
    x = 71,243,292,829.55/288,991.70
  6. Step 6: Final answer
    x = 246,523.66

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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.