Home / 806,631,859.20-1,209,947,788.80-261,428,505.60

Finding the Fourth Proportional to 806,631,859.20, 1,209,947,788.80 and 261,428,505.60

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Solution

The fourth proportional to 806,631,859.20, 1,209,947,788.80 and 261,428,505.60 is: 392,142,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,631,859.20 : 1,209,947,788.80 = 261,428,505.60 : x
  2. Step 2: Convert to fraction form
    806,631,859.20/1,209,947,788.80 = 261,428,505.60/x
  3. Step 3: Cross multiply
    806,631,859.20x = 1,209,947,788.80 × 261,428,505.60
  4. Step 4: Simplify right side
    806,631,859.20x = 316,314,842,280,008,384
  5. Step 5: Solve for x
    x = 316,314,842,280,008,384/806,631,859.20
  6. Step 6: Final answer
    x = 392,142,758.40

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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.