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Finding the Fourth Proportional to 423,601.98, 635,403.21 and 265,941.15

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Solution

The fourth proportional to 423,601.98, 635,403.21 and 265,941.15 is: 398,911.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,601.98 : 635,403.21 = 265,941.15 : x
  2. Step 2: Convert to fraction form
    423,601.98/635,403.21 = 265,941.15/x
  3. Step 3: Cross multiply
    423,601.98x = 635,403.21 × 265,941.15
  4. Step 4: Simplify right side
    423,601.98x = 168,979,860,381.09
  5. Step 5: Solve for x
    x = 168,979,860,381.09/423,601.98
  6. Step 6: Final answer
    x = 398,911.88

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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.