Home / 999,942,964.11-1,380,399,792.75-665,971,267.95

Finding the Fourth Proportional to 999,942,964.11, 1,380,399,792.75 and 665,971,267.95

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Solution

The fourth proportional to 999,942,964.11, 1,380,399,792.75 and 665,971,267.95 is: 919,359,036.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,942,964.11 : 1,380,399,792.75 = 665,971,267.95 : x
  2. Step 2: Convert to fraction form
    999,942,964.11/1,380,399,792.75 = 665,971,267.95/x
  3. Step 3: Cross multiply
    999,942,964.11x = 1,380,399,792.75 × 665,971,267.95
  4. Step 4: Simplify right side
    999,942,964.11x = 919,306,600,255,634,816
  5. Step 5: Solve for x
    x = 919,306,600,255,634,816/999,942,964.11
  6. Step 6: Final answer
    x = 919,359,036.72

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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.