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Finding the Fourth Proportional to 702,365,570.88, 969,324,009.21 and 389,198,018.40

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Solution

The fourth proportional to 702,365,570.88, 969,324,009.21 and 389,198,018.40 is: 537,126,247.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,365,570.88 : 969,324,009.21 = 389,198,018.40 : x
  2. Step 2: Convert to fraction form
    702,365,570.88/969,324,009.21 = 389,198,018.40/x
  3. Step 3: Cross multiply
    702,365,570.88x = 969,324,009.21 × 389,198,018.40
  4. Step 4: Simplify right side
    702,365,570.88x = 377,258,983,572,075,328
  5. Step 5: Solve for x
    x = 377,258,983,572,075,328/702,365,570.88
  6. Step 6: Final answer
    x = 537,126,247.66

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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.