Home / 645,205.75-890,433.80-387,092.41

Finding the Fourth Proportional to 645,205.75, 890,433.80 and 387,092.41

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Solution

The fourth proportional to 645,205.75, 890,433.80 and 387,092.41 is: 534,217.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,205.75 : 890,433.80 = 387,092.41 : x
  2. Step 2: Convert to fraction form
    645,205.75/890,433.80 = 387,092.41/x
  3. Step 3: Cross multiply
    645,205.75x = 890,433.80 × 387,092.41
  4. Step 4: Simplify right side
    645,205.75x = 344,680,165,587.46
  5. Step 5: Solve for x
    x = 344,680,165,587.46/645,205.75
  6. Step 6: Final answer
    x = 534,217.44

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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.