Home / 679,120.16-936,981.44-407,088.80

Finding the Fourth Proportional to 679,120.16, 936,981.44 and 407,088.80

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Solution

The fourth proportional to 679,120.16, 936,981.44 and 407,088.80 is: 561,660.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,120.16 : 936,981.44 = 407,088.80 : x
  2. Step 2: Convert to fraction form
    679,120.16/936,981.44 = 407,088.80/x
  3. Step 3: Cross multiply
    679,120.16x = 936,981.44 × 407,088.80
  4. Step 4: Simplify right side
    679,120.16x = 381,434,645,346.97
  5. Step 5: Solve for x
    x = 381,434,645,346.97/679,120.16
  6. Step 6: Final answer
    x = 561,660.02

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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.