Home / 641,918.28-885,873.95-355,438.36

Finding the Fourth Proportional to 641,918.28, 885,873.95 and 355,438.36

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Solution

The fourth proportional to 641,918.28, 885,873.95 and 355,438.36 is: 490,519.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,918.28 : 885,873.95 = 355,438.36 : x
  2. Step 2: Convert to fraction form
    641,918.28/885,873.95 = 355,438.36/x
  3. Step 3: Cross multiply
    641,918.28x = 885,873.95 × 355,438.36
  4. Step 4: Simplify right side
    641,918.28x = 314,873,584,617.77
  5. Step 5: Solve for x
    x = 314,873,584,617.77/641,918.28
  6. Step 6: Final answer
    x = 490,519.73

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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.