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Finding the Fourth Proportional to 979,776,019.20, 1,469,664,028.80 and 880,006,828.80

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Solution

The fourth proportional to 979,776,019.20, 1,469,664,028.80 and 880,006,828.80 is: 1,320,010,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,776,019.20 : 1,469,664,028.80 = 880,006,828.80 : x
  2. Step 2: Convert to fraction form
    979,776,019.20/1,469,664,028.80 = 880,006,828.80/x
  3. Step 3: Cross multiply
    979,776,019.20x = 1,469,664,028.80 × 880,006,828.80
  4. Step 4: Simplify right side
    979,776,019.20x = 1,293,314,381,385,719,808
  5. Step 5: Solve for x
    x = 1,293,314,381,385,719,808/979,776,019.20
  6. Step 6: Final answer
    x = 1,320,010,243.20

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1.5x scale

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.