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Finding the Fourth Proportional to 423,561.76, 635,156.08 and 198,986.02

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Solution

The fourth proportional to 423,561.76, 635,156.08 and 198,986.02 is: 298,391.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,561.76 : 635,156.08 = 198,986.02 : x
  2. Step 2: Convert to fraction form
    423,561.76/635,156.08 = 198,986.02/x
  3. Step 3: Cross multiply
    423,561.76x = 635,156.08 × 198,986.02
  4. Step 4: Simplify right side
    423,561.76x = 126,387,180,438.00
  5. Step 5: Solve for x
    x = 126,387,180,438.00/423,561.76
  6. Step 6: Final answer
    x = 298,391.39

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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.