Home / 645,088.14-890,244.48-354,721.80

Finding the Fourth Proportional to 645,088.14, 890,244.48 and 354,721.80

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Solution

The fourth proportional to 645,088.14, 890,244.48 and 354,721.80 is: 489,528.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,088.14 : 890,244.48 = 354,721.80 : x
  2. Step 2: Convert to fraction form
    645,088.14/890,244.48 = 354,721.80/x
  3. Step 3: Cross multiply
    645,088.14x = 890,244.48 × 354,721.80
  4. Step 4: Simplify right side
    645,088.14x = 315,789,124,385.66
  5. Step 5: Solve for x
    x = 315,789,124,385.66/645,088.14
  6. Step 6: Final answer
    x = 489,528.65

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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.