Home / 645,204.75-890,432.42-387,091.41

Finding the Fourth Proportional to 645,204.75, 890,432.42 and 387,091.41

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Solution

The fourth proportional to 645,204.75, 890,432.42 and 387,091.41 is: 534,216.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,204.75 : 890,432.42 = 387,091.41 : x
  2. Step 2: Convert to fraction form
    645,204.75/890,432.42 = 387,091.41/x
  3. Step 3: Cross multiply
    645,204.75x = 890,432.42 × 387,091.41
  4. Step 4: Simplify right side
    645,204.75x = 344,678,740,967.51
  5. Step 5: Solve for x
    x = 344,678,740,967.51/645,204.75
  6. Step 6: Final answer
    x = 534,216.06

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Double scale
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1.5x scale

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.