Home / 645,084.12-890,238.94-354,717.80

Finding the Fourth Proportional to 645,084.12, 890,238.94 and 354,717.80

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Solution

The fourth proportional to 645,084.12, 890,238.94 and 354,717.80 is: 489,523.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,084.12 : 890,238.94 = 354,717.80 : x
  2. Step 2: Convert to fraction form
    645,084.12/890,238.94 = 354,717.80/x
  3. Step 3: Cross multiply
    645,084.12x = 890,238.94 × 354,717.80
  4. Step 4: Simplify right side
    645,084.12x = 315,783,598,271.13
  5. Step 5: Solve for x
    x = 315,783,598,271.13/645,084.12
  6. Step 6: Final answer
    x = 489,523.13

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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.