Home / 680,940,007.20-1,021,410,010.80-408,618,266.40

Finding the Fourth Proportional to 680,940,007.20, 1,021,410,010.80 and 408,618,266.40

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Solution

The fourth proportional to 680,940,007.20, 1,021,410,010.80 and 408,618,266.40 is: 612,927,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,940,007.20 : 1,021,410,010.80 = 408,618,266.40 : x
  2. Step 2: Convert to fraction form
    680,940,007.20/1,021,410,010.80 = 408,618,266.40/x
  3. Step 3: Cross multiply
    680,940,007.20x = 1,021,410,010.80 × 408,618,266.40
  4. Step 4: Simplify right side
    680,940,007.20x = 417,366,787,896,701,248
  5. Step 5: Solve for x
    x = 417,366,787,896,701,248/680,940,007.20
  6. Step 6: Final answer
    x = 612,927,399.60

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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.