Home / 645,088.25-890,244.63-354,721.85

Finding the Fourth Proportional to 645,088.25, 890,244.63 and 354,721.85

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Solution

The fourth proportional to 645,088.25, 890,244.63 and 354,721.85 is: 489,528.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,088.25 : 890,244.63 = 354,721.85 : x
  2. Step 2: Convert to fraction form
    645,088.25/890,244.63 = 354,721.85/x
  3. Step 3: Cross multiply
    645,088.25x = 890,244.63 × 354,721.85
  4. Step 4: Simplify right side
    645,088.25x = 315,789,217,654.94
  5. Step 5: Solve for x
    x = 315,789,217,654.94/645,088.25
  6. Step 6: Final answer
    x = 489,528.71

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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.