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Finding the Fourth Proportional to 979,805,890.80, 1,469,708,836.20 and 435,610,306.80

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Solution

The fourth proportional to 979,805,890.80, 1,469,708,836.20 and 435,610,306.80 is: 653,415,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,805,890.80 : 1,469,708,836.20 = 435,610,306.80 : x
  2. Step 2: Convert to fraction form
    979,805,890.80/1,469,708,836.20 = 435,610,306.80/x
  3. Step 3: Cross multiply
    979,805,890.80x = 1,469,708,836.20 × 435,610,306.80
  4. Step 4: Simplify right side
    979,805,890.80x = 640,220,317,043,752,960
  5. Step 5: Solve for x
    x = 640,220,317,043,752,960/979,805,890.80
  6. Step 6: Final answer
    x = 653,415,460.20

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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.