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Finding the Fourth Proportional to 643,185.18, 887,650.02 and 356,797.50

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Solution

The fourth proportional to 643,185.18, 887,650.02 and 356,797.50 is: 492,410.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,185.18 : 887,650.02 = 356,797.50 : x
  2. Step 2: Convert to fraction form
    643,185.18/887,650.02 = 356,797.50/x
  3. Step 3: Cross multiply
    643,185.18x = 887,650.02 × 356,797.50
  4. Step 4: Simplify right side
    643,185.18x = 316,711,308,010.95
  5. Step 5: Solve for x
    x = 316,711,308,010.95/643,185.18
  6. Step 6: Final answer
    x = 492,410.77

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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.