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Finding the Fourth Proportional to 979,848,011.20, 1,469,772,016.80 and 669,454,974.40

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Solution

The fourth proportional to 979,848,011.20, 1,469,772,016.80 and 669,454,974.40 is: 1,004,182,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,848,011.20 : 1,469,772,016.80 = 669,454,974.40 : x
  2. Step 2: Convert to fraction form
    979,848,011.20/1,469,772,016.80 = 669,454,974.40/x
  3. Step 3: Cross multiply
    979,848,011.20x = 1,469,772,016.80 × 669,454,974.40
  4. Step 4: Simplify right side
    979,848,011.20x = 983,946,187,880,680,320
  5. Step 5: Solve for x
    x = 983,946,187,880,680,320/979,848,011.20
  6. Step 6: Final answer
    x = 1,004,182,461.60

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Similar ratio
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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.