Home / 643,212.18-887,687.28-356,824.50

Finding the Fourth Proportional to 643,212.18, 887,687.28 and 356,824.50

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Solution

The fourth proportional to 643,212.18, 887,687.28 and 356,824.50 is: 492,448.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,212.18 : 887,687.28 = 356,824.50 : x
  2. Step 2: Convert to fraction form
    643,212.18/887,687.28 = 356,824.50/x
  3. Step 3: Cross multiply
    643,212.18x = 887,687.28 × 356,824.50
  4. Step 4: Simplify right side
    643,212.18x = 316,748,569,842.36
  5. Step 5: Solve for x
    x = 316,748,569,842.36/643,212.18
  6. Step 6: Final answer
    x = 492,448.03

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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.