Home / 645,513.45-890,796.15-355,108.04

Finding the Fourth Proportional to 645,513.45, 890,796.15 and 355,108.04

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Solution

The fourth proportional to 645,513.45, 890,796.15 and 355,108.04 is: 490,042.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,513.45 : 890,796.15 = 355,108.04 : x
  2. Step 2: Convert to fraction form
    645,513.45/890,796.15 = 355,108.04/x
  3. Step 3: Cross multiply
    645,513.45x = 890,796.15 × 355,108.04
  4. Step 4: Simplify right side
    645,513.45x = 316,328,874,866.05
  5. Step 5: Solve for x
    x = 316,328,874,866.05/645,513.45
  6. Step 6: Final answer
    x = 490,042.27

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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.