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Finding the Fourth Proportional to 479,436.39, 661,638.10 and 261,656.98

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Solution

The fourth proportional to 479,436.39, 661,638.10 and 261,656.98 is: 361,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,436.39 : 661,638.10 = 261,656.98 : x
  2. Step 2: Convert to fraction form
    479,436.39/661,638.10 = 261,656.98/x
  3. Step 3: Cross multiply
    479,436.39x = 661,638.10 × 261,656.98
  4. Step 4: Simplify right side
    479,436.39x = 173,122,225,771.91
  5. Step 5: Solve for x
    x = 173,122,225,771.91/479,436.39
  6. Step 6: Final answer
    x = 361,095.30

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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.