Home / 691,394,361.20-954,066,539.84-389,963,061.92

Finding the Fourth Proportional to 691,394,361.20, 954,066,539.84 and 389,963,061.92

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Solution

The fourth proportional to 691,394,361.20, 954,066,539.84 and 389,963,061.92 is: 538,116,493.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,394,361.20 : 954,066,539.84 = 389,963,061.92 : x
  2. Step 2: Convert to fraction form
    691,394,361.20/954,066,539.84 = 389,963,061.92/x
  3. Step 3: Cross multiply
    691,394,361.20x = 954,066,539.84 × 389,963,061.92
  4. Step 4: Simplify right side
    691,394,361.20x = 372,050,709,151,426,112
  5. Step 5: Solve for x
    x = 372,050,709,151,426,112/691,394,361.20
  6. Step 6: Final answer
    x = 538,116,493.32

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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.