Home / 643,361.28-887,945.01-356,973.63

Finding the Fourth Proportional to 643,361.28, 887,945.01 and 356,973.63

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Solution

The fourth proportional to 643,361.28, 887,945.01 and 356,973.63 is: 492,682.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,361.28 : 887,945.01 = 356,973.63 : x
  2. Step 2: Convert to fraction form
    643,361.28/887,945.01 = 356,973.63/x
  3. Step 3: Cross multiply
    643,361.28x = 887,945.01 × 356,973.63
  4. Step 4: Simplify right side
    643,361.28x = 316,972,954,790.32
  5. Step 5: Solve for x
    x = 316,972,954,790.32/643,361.28
  6. Step 6: Final answer
    x = 492,682.67

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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.