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Finding the Fourth Proportional to 909,721,958.12, 1,360,992,533.46 and 689,029,043.43

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Solution

The fourth proportional to 909,721,958.12, 1,360,992,533.46 and 689,029,043.43 is: 1,030,824,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,721,958.12 : 1,360,992,533.46 = 689,029,043.43 : x
  2. Step 2: Convert to fraction form
    909,721,958.12/1,360,992,533.46 = 689,029,043.43/x
  3. Step 3: Cross multiply
    909,721,958.12x = 1,360,992,533.46 × 689,029,043.43
  4. Step 4: Simplify right side
    909,721,958.12x = 937,763,383,447,870,464
  5. Step 5: Solve for x
    x = 937,763,383,447,870,464/909,721,958.12
  6. Step 6: Final answer
    x = 1,030,824,171.14

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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.