Home / 643,028.28-887,284.08-356,550.45

Finding the Fourth Proportional to 643,028.28, 887,284.08 and 356,550.45

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Solution

The fourth proportional to 643,028.28, 887,284.08 and 356,550.45 is: 491,986.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,028.28 : 887,284.08 = 356,550.45 : x
  2. Step 2: Convert to fraction form
    643,028.28/887,284.08 = 356,550.45/x
  3. Step 3: Cross multiply
    643,028.28x = 887,284.08 × 356,550.45
  4. Step 4: Simplify right side
    643,028.28x = 316,361,538,001.84
  5. Step 5: Solve for x
    x = 316,361,538,001.84/643,028.28
  6. Step 6: Final answer
    x = 491,986.97

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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.