Home / 645,334.90-890,583.80-354,958.75

Finding the Fourth Proportional to 645,334.90, 890,583.80 and 354,958.75

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Solution

The fourth proportional to 645,334.90, 890,583.80 and 354,958.75 is: 489,854.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,334.90 : 890,583.80 = 354,958.75 : x
  2. Step 2: Convert to fraction form
    645,334.90/890,583.80 = 354,958.75/x
  3. Step 3: Cross multiply
    645,334.90x = 890,583.80 × 354,958.75
  4. Step 4: Simplify right side
    645,334.90x = 316,120,512,418.25
  5. Step 5: Solve for x
    x = 316,120,512,418.25/645,334.90
  6. Step 6: Final answer
    x = 489,854.98

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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.