Home / 645,162.60-890,343.63-354,759.06

Finding the Fourth Proportional to 645,162.60, 890,343.63 and 354,759.06

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Solution

The fourth proportional to 645,162.60, 890,343.63 and 354,759.06 is: 489,578.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,162.60 : 890,343.63 = 354,759.06 : x
  2. Step 2: Convert to fraction form
    645,162.60/890,343.63 = 354,759.06/x
  3. Step 3: Cross multiply
    645,162.60x = 890,343.63 × 354,759.06
  4. Step 4: Simplify right side
    645,162.60x = 315,857,469,255.79
  5. Step 5: Solve for x
    x = 315,857,469,255.79/645,162.60
  6. Step 6: Final answer
    x = 489,578.08

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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.