Home / 645,204.12-890,358.42-354,813.24

Finding the Fourth Proportional to 645,204.12, 890,358.42 and 354,813.24

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Solution

The fourth proportional to 645,204.12, 890,358.42 and 354,813.24 is: 489,629.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,204.12 : 890,358.42 = 354,813.24 : x
  2. Step 2: Convert to fraction form
    645,204.12/890,358.42 = 354,813.24/x
  3. Step 3: Cross multiply
    645,204.12x = 890,358.42 × 354,813.24
  4. Step 4: Simplify right side
    645,204.12x = 315,910,955,761.48
  5. Step 5: Solve for x
    x = 315,910,955,761.48/645,204.12
  6. Step 6: Final answer
    x = 489,629.48

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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.