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Finding the Fourth Proportional to 394,962.48, 592,505.16 and 128,661

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Solution

The fourth proportional to 394,962.48, 592,505.16 and 128,661 is: 193,011.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,962.48 : 592,505.16 = 128,661 : x
  2. Step 2: Convert to fraction form
    394,962.48/592,505.16 = 128,661/x
  3. Step 3: Cross multiply
    394,962.48x = 592,505.16 × 128,661
  4. Step 4: Simplify right side
    394,962.48x = 76,232,306,390.76
  5. Step 5: Solve for x
    x = 76,232,306,390.76/394,962.48
  6. Step 6: Final answer
    x = 193,011.51

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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.