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Finding the Fourth Proportional to 702,365,572.38, 969,324,011.28 and 389,198,019.90

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Solution

The fourth proportional to 702,365,572.38, 969,324,011.28 and 389,198,019.90 is: 537,126,249.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,365,572.38 : 969,324,011.28 = 389,198,019.90 : x
  2. Step 2: Convert to fraction form
    702,365,572.38/969,324,011.28 = 389,198,019.90/x
  3. Step 3: Cross multiply
    702,365,572.38x = 969,324,011.28 × 389,198,019.90
  4. Step 4: Simplify right side
    702,365,572.38x = 377,258,985,831,701,248
  5. Step 5: Solve for x
    x = 377,258,985,831,701,248/702,365,572.38
  6. Step 6: Final answer
    x = 537,126,249.73

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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.