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Finding the Fourth Proportional to 707,819,892.89, 977,209,976.85 and 629,286,155.37

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Solution

The fourth proportional to 707,819,892.89, 977,209,976.85 and 629,286,155.37 is: 868,786,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,819,892.89 : 977,209,976.85 = 629,286,155.37 : x
  2. Step 2: Convert to fraction form
    707,819,892.89/977,209,976.85 = 629,286,155.37/x
  3. Step 3: Cross multiply
    707,819,892.89x = 977,209,976.85 × 629,286,155.37
  4. Step 4: Simplify right side
    707,819,892.89x = 614,944,709,321,143,168
  5. Step 5: Solve for x
    x = 614,944,709,321,143,168/707,819,892.89
  6. Step 6: Final answer
    x = 868,786,983.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.