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Finding the Fourth Proportional to 384,072.83, 530,219.79 and 280,590.97

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Solution

The fourth proportional to 384,072.83, 530,219.79 and 280,590.97 is: 387,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,072.83 : 530,219.79 = 280,590.97 : x
  2. Step 2: Convert to fraction form
    384,072.83/530,219.79 = 280,590.97/x
  3. Step 3: Cross multiply
    384,072.83x = 530,219.79 × 280,590.97
  4. Step 4: Simplify right side
    384,072.83x = 148,774,885,189.30
  5. Step 5: Solve for x
    x = 148,774,885,189.30/384,072.83
  6. Step 6: Final answer
    x = 387,361.13

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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.