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Finding the Fourth Proportional to 479,559.85, 661,808.63 and 261,781.45

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Solution

The fourth proportional to 479,559.85, 661,808.63 and 261,781.45 is: 361,267.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,559.85 : 661,808.63 = 261,781.45 : x
  2. Step 2: Convert to fraction form
    479,559.85/661,808.63 = 261,781.45/x
  3. Step 3: Cross multiply
    479,559.85x = 661,808.63 × 261,781.45
  4. Step 4: Simplify right side
    479,559.85x = 173,249,222,783.91
  5. Step 5: Solve for x
    x = 173,249,222,783.91/479,559.85
  6. Step 6: Final answer
    x = 361,267.16

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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.