Home / 391,392,287.60-587,088,431.40-209,993,759.60

Finding the Fourth Proportional to 391,392,287.60, 587,088,431.40 and 209,993,759.60

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Solution

The fourth proportional to 391,392,287.60, 587,088,431.40 and 209,993,759.60 is: 314,990,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,392,287.60 : 587,088,431.40 = 209,993,759.60 : x
  2. Step 2: Convert to fraction form
    391,392,287.60/587,088,431.40 = 209,993,759.60/x
  3. Step 3: Cross multiply
    391,392,287.60x = 587,088,431.40 × 209,993,759.60
  4. Step 4: Simplify right side
    391,392,287.60x = 123,284,906,927,352,688
  5. Step 5: Solve for x
    x = 123,284,906,927,352,688/391,392,287.60
  6. Step 6: Final answer
    x = 314,990,639.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.