Home / 645,372.12-890,433.48-387,087.42

Finding the Fourth Proportional to 645,372.12, 890,433.48 and 387,087.42

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Solution

The fourth proportional to 645,372.12, 890,433.48 and 387,087.42 is: 534,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,372.12 : 890,433.48 = 387,087.42 : x
  2. Step 2: Convert to fraction form
    645,372.12/890,433.48 = 387,087.42/x
  3. Step 3: Cross multiply
    645,372.12x = 890,433.48 × 387,087.42
  4. Step 4: Simplify right side
    645,372.12x = 344,675,598,454.82
  5. Step 5: Solve for x
    x = 344,675,598,454.82/645,372.12
  6. Step 6: Final answer
    x = 534,072.65

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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.