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Finding the Fourth Proportional to 479,421.80, 661,715.32 and 275,590.98

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Solution

The fourth proportional to 479,421.80, 661,715.32 and 275,590.98 is: 380,380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,421.80 : 661,715.32 = 275,590.98 : x
  2. Step 2: Convert to fraction form
    479,421.80/661,715.32 = 275,590.98/x
  3. Step 3: Cross multiply
    479,421.80x = 661,715.32 × 275,590.98
  4. Step 4: Simplify right side
    479,421.80x = 182,362,773,519.81
  5. Step 5: Solve for x
    x = 182,362,773,519.81/479,421.80
  6. Step 6: Final answer
    x = 380,380.65

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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.