Home / 999,942,965.11-1,380,399,794.13-665,971,268.95

Finding the Fourth Proportional to 999,942,965.11, 1,380,399,794.13 and 665,971,268.95

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Solution

The fourth proportional to 999,942,965.11, 1,380,399,794.13 and 665,971,268.95 is: 919,359,038.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,942,965.11 : 1,380,399,794.13 = 665,971,268.95 : x
  2. Step 2: Convert to fraction form
    999,942,965.11/1,380,399,794.13 = 665,971,268.95/x
  3. Step 3: Cross multiply
    999,942,965.11x = 1,380,399,794.13 × 665,971,268.95
  4. Step 4: Simplify right side
    999,942,965.11x = 919,306,602,555,074,944
  5. Step 5: Solve for x
    x = 919,306,602,555,074,944/999,942,965.11
  6. Step 6: Final answer
    x = 919,359,038.10

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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.