Home / 645,088.75-890,245.32-354,722.35

Finding the Fourth Proportional to 645,088.75, 890,245.32 and 354,722.35

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Solution

The fourth proportional to 645,088.75, 890,245.32 and 354,722.35 is: 489,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,088.75 : 890,245.32 = 354,722.35 : x
  2. Step 2: Convert to fraction form
    645,088.75/890,245.32 = 354,722.35/x
  3. Step 3: Cross multiply
    645,088.75x = 890,245.32 × 354,722.35
  4. Step 4: Simplify right side
    645,088.75x = 315,789,907,535.68
  5. Step 5: Solve for x
    x = 315,789,907,535.68/645,088.75
  6. Step 6: Final answer
    x = 489,529.40

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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.