Home / 645,204.62-890,432.25-387,091.28

Finding the Fourth Proportional to 645,204.62, 890,432.25 and 387,091.28

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Solution

The fourth proportional to 645,204.62, 890,432.25 and 387,091.28 is: 534,215.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,204.62 : 890,432.25 = 387,091.28 : x
  2. Step 2: Convert to fraction form
    645,204.62/890,432.25 = 387,091.28/x
  3. Step 3: Cross multiply
    645,204.62x = 890,432.25 × 387,091.28
  4. Step 4: Simplify right side
    645,204.62x = 344,678,559,405.78
  5. Step 5: Solve for x
    x = 344,678,559,405.78/645,204.62
  6. Step 6: Final answer
    x = 534,215.89

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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.